diff --git a/Process.c b/Process.c
index eb080f03..ec4d853e 100644
--- a/Process.c
+++ b/Process.c
@@ -326,7 +326,7 @@ void Process_writeField(const Process* this, RichString* str, ProcessField field
    case MAJFLT: Process_colorNumber(str, this->majflt, coloring); return;
    case MINFLT: Process_colorNumber(str, this->minflt, coloring); return;
    case M_RESIDENT: Process_humanNumber(str, this->m_resident * CRT_pageSizeKB, coloring); return;
-   case M_SIZE: Process_humanNumber(str, this->m_size * CRT_pageSizeKB, coloring); return;
+   case M_VIRT: Process_humanNumber(str, this->m_virt * CRT_pageSizeKB, coloring); return;
    case NICE: {
       xSnprintf(buffer, n, "%3ld ", this->nice);
       attr = this->nice < 0 ? CRT_colors[PROCESS_HIGH_PRIORITY]
@@ -510,8 +510,8 @@ long Process_compare(const void* v1, const void* v2) {
       return SPACESHIP_NUMBER(p2->minflt, p1->minflt);
    case M_RESIDENT:
       return SPACESHIP_NUMBER(p2->m_resident, p1->m_resident);
-   case M_SIZE:
-      return SPACESHIP_NUMBER(p2->m_size, p1->m_size);
+   case M_VIRT:
+      return SPACESHIP_NUMBER(p2->m_virt, p1->m_virt);
    case NICE:
       return SPACESHIP_NUMBER(p1->nice, p2->nice);
    case NLWP:
diff --git a/Process.h b/Process.h
index a76161d8..595e2bec 100644
--- a/Process.h
+++ b/Process.h
@@ -38,7 +38,7 @@ typedef enum ProcessFields {
    NICE = 19,
    STARTTIME = 21,
    PROCESSOR = 38,
-   M_SIZE = 39,
+   M_VIRT = 39,
    M_RESIDENT = 40,
    ST_UID = 46,
    PERCENT_CPU = 47,
@@ -97,7 +97,7 @@ typedef struct Process_ {
    char starttime_show[8];
    time_t starttime_ctime;
 
-   long m_size;
+   long m_virt;
    long m_resident;
 
    int exit_signal;
diff --git a/darwin/DarwinProcess.c b/darwin/DarwinProcess.c
index b8362da7..f3c34254 100644
--- a/darwin/DarwinProcess.c
+++ b/darwin/DarwinProcess.c
@@ -204,7 +204,7 @@ void DarwinProcess_setFromKInfoProc(Process* proc, const struct kinfo_proc* ps,
     * nlwp
     * percent_cpu
     * percent_mem
-    * m_size
+    * m_virt
     * m_resident
     * minflt
     * majflt
@@ -258,7 +258,7 @@ void DarwinProcess_setFromLibprocPidinfo(DarwinProcess* proc, DarwinProcessList*
 
       proc->super.time = (pti.pti_total_system + pti.pti_total_user) / 10000000;
       proc->super.nlwp = pti.pti_threadnum;
-      proc->super.m_size = pti.pti_virtual_size / CRT_pageSize;
+      proc->super.m_virt = pti.pti_virtual_size / CRT_pageSize;
       proc->super.m_resident = pti.pti_resident_size / CRT_pageSize;
       proc->super.majflt = pti.pti_faults;
       proc->super.percent_mem = (double)pti.pti_resident_size * 100.0
diff --git a/darwin/Platform.c b/darwin/Platform.c
index bf9645b3..fe3505e9 100644
--- a/darwin/Platform.c
+++ b/darwin/Platform.c
@@ -31,7 +31,7 @@ in the source distribution for its full text.
 #include <IOKit/ps/IOPowerSources.h>
 #include <IOKit/ps/IOPSKeys.h>
 
-ProcessField Platform_defaultFields[] = { PID, USER, PRIORITY, NICE, M_SIZE, M_RESIDENT, STATE, PERCENT_CPU, PERCENT_MEM, TIME, COMM, 0 };
+ProcessField Platform_defaultFields[] = { PID, USER, PRIORITY, NICE, M_VIRT, M_RESIDENT, STATE, PERCENT_CPU, PERCENT_MEM, TIME, COMM, 0 };
 
 const SignalItem Platform_signals[] = {
    { .name = " 0 Cancel",    .number =  0 },
@@ -88,7 +88,7 @@ ProcessFieldData Process_fields[] = {
    [STARTTIME] = { .name = "STARTTIME", .title = "START ", .description = "Time the process was started", .flags = 0, },
 
    [PROCESSOR] = { .name = "PROCESSOR", .title = "CPU ", .description = "Id of the CPU the process last executed on", .flags = 0, },
-   [M_SIZE] = { .name = "M_SIZE", .title = " VIRT ", .description = "Total program size in virtual memory", .flags = 0, },
+   [M_VIRT] = { .name = "M_VIRT", .title = " VIRT ", .description = "Total program size in virtual memory", .flags = 0, },
    [M_RESIDENT] = { .name = "M_RESIDENT", .title = "  RES ", .description = "Resident set size, size of the text and data sections, plus stack usage", .flags = 0, },
    [ST_UID] = { .name = "ST_UID", .title = "  UID ", .description = "User ID of the process owner", .flags = 0, },
    [PERCENT_CPU] = { .name = "PERCENT_CPU", .title = "CPU% ", .description = "Percentage of the CPU time the process used in the last sampling", .flags = 0, },
diff --git a/dragonflybsd/DragonFlyBSDProcess.c b/dragonflybsd/DragonFlyBSDProcess.c
index 4130e799..9311f03c 100644
--- a/dragonflybsd/DragonFlyBSDProcess.c
+++ b/dragonflybsd/DragonFlyBSDProcess.c
@@ -44,7 +44,7 @@ ProcessFieldData Process_fields[] = {
    [NICE] = { .name = "NICE", .title = " NI ", .description = "Nice value (the higher the value, the more it lets other processes take priority)", .flags = 0, },
    [STARTTIME] = { .name = "STARTTIME", .title = "START ", .description = "Time the process was started", .flags = 0, },
    [PROCESSOR] = { .name = "PROCESSOR", .title = "CPU ", .description = "Id of the CPU the process last executed on", .flags = 0, },
-   [M_SIZE] = { .name = "M_SIZE", .title = " VIRT ", .description = "Total program size in virtual memory", .flags = 0, },
+   [M_VIRT] = { .name = "M_VIRT", .title = " VIRT ", .description = "Total program size in virtual memory", .flags = 0, },
    [M_RESIDENT] = { .name = "M_RESIDENT", .title = "  RES ", .description = "Resident set size, size of the text and data sections, plus stack usage", .flags = 0, },
    [ST_UID] = { .name = "ST_UID", .title = "  UID ", .description = "User ID of the process owner", .flags = 0, },
    [PERCENT_CPU] = { .name = "PERCENT_CPU", .title = "CPU% ", .description = "Percentage of the CPU time the process used in the last sampling", .flags = 0, },
diff --git a/dragonflybsd/DragonFlyBSDProcessList.c b/dragonflybsd/DragonFlyBSDProcessList.c
index a584f034..5d72ea48 100644
--- a/dragonflybsd/DragonFlyBSDProcessList.c
+++ b/dragonflybsd/DragonFlyBSDProcessList.c
@@ -442,7 +442,7 @@ void ProcessList_goThroughEntries(ProcessList* super, bool pauseProcessUpdate) {
          }
       }
 
-      proc->m_size = kproc->kp_vm_map_size / 1024 / pageSizeKb;
+      proc->m_virt = kproc->kp_vm_map_size / 1024 / pageSizeKb;
       proc->m_resident = kproc->kp_vm_rssize;
       proc->nlwp = kproc->kp_nthreads;		// number of lwp thread
       proc->time = (kproc->kp_swtime + 5000) / 10000;
diff --git a/dragonflybsd/Platform.c b/dragonflybsd/Platform.c
index c6966c11..5f754d2a 100644
--- a/dragonflybsd/Platform.c
+++ b/dragonflybsd/Platform.c
@@ -31,7 +31,7 @@ in the source distribution for its full text.
 #include <math.h>
 
 
-ProcessField Platform_defaultFields[] = { PID, USER, PRIORITY, NICE, M_SIZE, M_RESIDENT, STATE, PERCENT_CPU, PERCENT_MEM, TIME, COMM, 0 };
+ProcessField Platform_defaultFields[] = { PID, USER, PRIORITY, NICE, M_VIRT, M_RESIDENT, STATE, PERCENT_CPU, PERCENT_MEM, TIME, COMM, 0 };
 
 int Platform_numberOfFields = LAST_PROCESSFIELD;
 
diff --git a/freebsd/FreeBSDProcess.c b/freebsd/FreeBSDProcess.c
index c4568677..d6d67b75 100644
--- a/freebsd/FreeBSDProcess.c
+++ b/freebsd/FreeBSDProcess.c
@@ -35,7 +35,7 @@ ProcessFieldData Process_fields[] = {
    [STARTTIME] = { .name = "STARTTIME", .title = "START ", .description = "Time the process was started", .flags = 0, },
 
    [PROCESSOR] = { .name = "PROCESSOR", .title = "CPU ", .description = "Id of the CPU the process last executed on", .flags = 0, },
-   [M_SIZE] = { .name = "M_SIZE", .title = " VIRT ", .description = "Total program size in virtual memory", .flags = 0, },
+   [M_VIRT] = { .name = "M_VIRT", .title = " VIRT ", .description = "Total program size in virtual memory", .flags = 0, },
    [M_RESIDENT] = { .name = "M_RESIDENT", .title = "  RES ", .description = "Resident set size, size of the text and data sections, plus stack usage", .flags = 0, },
    [ST_UID] = { .name = "ST_UID", .title = "  UID ", .description = "User ID of the process owner", .flags = 0, },
    [PERCENT_CPU] = { .name = "PERCENT_CPU", .title = "CPU% ", .description = "Percentage of the CPU time the process used in the last sampling", .flags = 0, },
diff --git a/freebsd/FreeBSDProcessList.c b/freebsd/FreeBSDProcessList.c
index 7dd432f5..161f64ba 100644
--- a/freebsd/FreeBSDProcessList.c
+++ b/freebsd/FreeBSDProcessList.c
@@ -543,7 +543,7 @@ void ProcessList_goThroughEntries(ProcessList* super, bool pauseProcessUpdate) {
       }
 
       // from FreeBSD source /src/usr.bin/top/machine.c
-      proc->m_size = kproc->ki_size / 1024 / pageSizeKb;
+      proc->m_virt = kproc->ki_size / 1024 / pageSizeKb;
       proc->m_resident = kproc->ki_rssize;
       proc->nlwp = kproc->ki_numthreads;
       proc->time = (kproc->ki_runtime + 5000) / 10000;
diff --git a/freebsd/Platform.c b/freebsd/Platform.c
index f73b48bd..6505f746 100644
--- a/freebsd/Platform.c
+++ b/freebsd/Platform.c
@@ -47,7 +47,7 @@ in the source distribution for its full text.
 #include "zfs/ZfsCompressedArcMeter.h"
 
 
-ProcessField Platform_defaultFields[] = { PID, USER, PRIORITY, NICE, M_SIZE, M_RESIDENT, STATE, PERCENT_CPU, PERCENT_MEM, TIME, COMM, 0 };
+ProcessField Platform_defaultFields[] = { PID, USER, PRIORITY, NICE, M_VIRT, M_RESIDENT, STATE, PERCENT_CPU, PERCENT_MEM, TIME, COMM, 0 };
 
 int Platform_numberOfFields = LAST_PROCESSFIELD;
 
diff --git a/htop.1.in b/htop.1.in
index 6048449d..f597ea90 100644
--- a/htop.1.in
+++ b/htop.1.in
@@ -312,7 +312,7 @@ The time the process was started.
 .B PROCESSOR (CPU)
 The ID of the CPU the process last executed on.
 .TP
-.B M_SIZE (VIRT)
+.B M_VIRT (VIRT)
 The size of the virtual memory of the process.
 .TP
 .B M_RESIDENT (RES)
diff --git a/linux/LinuxProcess.c b/linux/LinuxProcess.c
index c75291ce..6bed3322 100644
--- a/linux/LinuxProcess.c
+++ b/linux/LinuxProcess.c
@@ -65,7 +65,7 @@ ProcessFieldData Process_fields[] = {
    [CNSWAP] = { .name = "CNSWAP", .title = NULL, .description = NULL, .flags = 0, },
    [EXIT_SIGNAL] = { .name = "EXIT_SIGNAL", .title = NULL, .description = NULL, .flags = 0, },
    [PROCESSOR] = { .name = "PROCESSOR", .title = "CPU ", .description = "Id of the CPU the process last executed on", .flags = 0, },
-   [M_SIZE] = { .name = "M_SIZE", .title = " VIRT ", .description = "Total program size in virtual memory", .flags = 0, },
+   [M_VIRT] = { .name = "M_VIRT", .title = " VIRT ", .description = "Total program size in virtual memory", .flags = 0, },
    [M_RESIDENT] = { .name = "M_RESIDENT", .title = "  RES ", .description = "Resident set size, size of the text and data sections, plus stack usage", .flags = 0, },
    [M_SHARE] = { .name = "M_SHARE", .title = "  SHR ", .description = "Size of the process's shared pages", .flags = 0, },
    [M_TRS] = { .name = "M_TRS", .title = " CODE ", .description = "Size of the text segment of the process", .flags = 0, },
diff --git a/linux/LinuxProcessList.c b/linux/LinuxProcessList.c
index ecf84a79..4f40acad 100644
--- a/linux/LinuxProcessList.c
+++ b/linux/LinuxProcessList.c
@@ -494,7 +494,7 @@ static bool LinuxProcessList_readStatmFile(LinuxProcess* process, const char* di
       return false;
 
    int r = fscanf(statmfile, "%ld %ld %ld %ld %ld %ld %ld",
-                  &process->super.m_size,
+                  &process->super.m_virt,
                   &process->super.m_resident,
                   &process->m_share,
                   &process->m_trs,
diff --git a/linux/Platform.c b/linux/Platform.c
index 21d65156..ff20d133 100644
--- a/linux/Platform.c
+++ b/linux/Platform.c
@@ -62,7 +62,7 @@ in the source distribution for its full text.
 #include "zfs/ZfsCompressedArcMeter.h"
 
 
-ProcessField Platform_defaultFields[] = { PID, USER, PRIORITY, NICE, M_SIZE, M_RESIDENT, (int)M_SHARE, STATE, PERCENT_CPU, PERCENT_MEM, TIME, COMM, 0 };
+ProcessField Platform_defaultFields[] = { PID, USER, PRIORITY, NICE, M_VIRT, M_RESIDENT, (int)M_SHARE, STATE, PERCENT_CPU, PERCENT_MEM, TIME, COMM, 0 };
 
 //static ProcessField defaultIoFields[] = { PID, IO_PRIORITY, USER, IO_READ_RATE, IO_WRITE_RATE, IO_RATE, COMM, 0 };
 
diff --git a/openbsd/OpenBSDProcess.c b/openbsd/OpenBSDProcess.c
index de823ce4..4b79ea36 100644
--- a/openbsd/OpenBSDProcess.c
+++ b/openbsd/OpenBSDProcess.c
@@ -118,8 +118,8 @@ ProcessFieldData Process_fields[] = {
       .description = "Id of the CPU the process last executed on",
       .flags = 0,
    },
-   [M_SIZE] = {
-      .name = "M_SIZE",
+   [M_VIRT] = {
+      .name = "M_VIRT",
       .title = " VIRT ",
       .description = "Total program size in virtual memory",
       .flags = 0,
diff --git a/openbsd/OpenBSDProcessList.c b/openbsd/OpenBSDProcessList.c
index aec13477..6b0b3951 100644
--- a/openbsd/OpenBSDProcessList.c
+++ b/openbsd/OpenBSDProcessList.c
@@ -229,7 +229,7 @@ static inline void OpenBSDProcessList_scanProcs(OpenBSDProcessList* this) {
          }
       }
 
-      proc->m_size = kproc->p_vm_dsize;
+      proc->m_virt = kproc->p_vm_dsize;
       proc->m_resident = kproc->p_vm_rssize;
       proc->percent_mem = (proc->m_resident * CRT_pageSizeKB) / (double)(this->super.totalMem) * 100.0;
       proc->percent_cpu = CLAMP(getpcpu(kproc), 0.0, this->super.cpuCount * 100.0);
diff --git a/openbsd/Platform.c b/openbsd/Platform.c
index bf045396..57b561e3 100644
--- a/openbsd/Platform.c
+++ b/openbsd/Platform.c
@@ -43,7 +43,7 @@ in the source distribution for its full text.
 #include <math.h>
 
 
-ProcessField Platform_defaultFields[] = { PID, USER, PRIORITY, NICE, M_SIZE, M_RESIDENT, STATE, PERCENT_CPU, PERCENT_MEM, TIME, COMM, 0 };
+ProcessField Platform_defaultFields[] = { PID, USER, PRIORITY, NICE, M_VIRT, M_RESIDENT, STATE, PERCENT_CPU, PERCENT_MEM, TIME, COMM, 0 };
 
 int Platform_numberOfFields = LAST_PROCESSFIELD;
 
diff --git a/solaris/Platform.c b/solaris/Platform.c
index 7eff2d5f..ff2e5c61 100644
--- a/solaris/Platform.c
+++ b/solaris/Platform.c
@@ -86,7 +86,7 @@ const SignalItem Platform_signals[] = {
 
 const unsigned int Platform_numberOfSignals = ARRAYSIZE(Platform_signals);
 
-ProcessField Platform_defaultFields[] = { PID, LWPID, USER, PRIORITY, NICE, M_SIZE, M_RESIDENT, STATE, PERCENT_CPU, PERCENT_MEM, TIME, COMM, 0 };
+ProcessField Platform_defaultFields[] = { PID, LWPID, USER, PRIORITY, NICE, M_VIRT, M_RESIDENT, STATE, PERCENT_CPU, PERCENT_MEM, TIME, COMM, 0 };
 
 const MeterClass* const Platform_meterTypes[] = {
    &CPUMeter_class,
diff --git a/solaris/SolarisProcess.c b/solaris/SolarisProcess.c
index c11c6de8..e0a3db24 100644
--- a/solaris/SolarisProcess.c
+++ b/solaris/SolarisProcess.c
@@ -44,7 +44,7 @@ ProcessFieldData Process_fields[] = {
    [NICE] = { .name = "NICE", .title = " NI ", .description = "Nice value (the higher the value, the more it lets other processes take priority)", .flags = 0, },
    [STARTTIME] = { .name = "STARTTIME", .title = "START ", .description = "Time the process was started", .flags = 0, },
    [PROCESSOR] = { .name = "PROCESSOR", .title = "CPU ", .description = "Id of the CPU the process last executed on", .flags = 0, },
-   [M_SIZE] = { .name = "M_SIZE", .title = " VIRT ", .description = "Total program size in virtual memory", .flags = 0, },
+   [M_VIRT] = { .name = "M_VIRT", .title = " VIRT ", .description = "Total program size in virtual memory", .flags = 0, },
    [M_RESIDENT] = { .name = "M_RESIDENT", .title = "  RES ", .description = "Resident set size, size of the text and data sections, plus stack usage", .flags = 0, },
    [ST_UID] = { .name = "ST_UID", .title = "  UID ", .description = "User ID of the process owner", .flags = 0, },
    [PERCENT_CPU] = { .name = "PERCENT_CPU", .title = "CPU% ", .description = "Percentage of the CPU time the process used in the last sampling", .flags = 0, },
diff --git a/solaris/SolarisProcessList.c b/solaris/SolarisProcessList.c
index 49aeb24c..474c0fd1 100644
--- a/solaris/SolarisProcessList.c
+++ b/solaris/SolarisProcessList.c
@@ -323,7 +323,7 @@ int SolarisProcessList_walkproc(psinfo_t* _psinfo, lwpsinfo_t* _lwpsinfo, void*
    proc->nlwp               = _psinfo->pr_nlwp;
    proc->tty_nr             = _psinfo->pr_ttydev;
    proc->m_resident         = _psinfo->pr_rssize / CRT_pageSizeKB;
-   proc->m_size             = _psinfo->pr_size / CRT_pageSizeKB;
+   proc->m_virt             = _psinfo->pr_size / CRT_pageSizeKB;
 
    if (!preExisting) {
       sproc->realpid        = _psinfo->pr_pid;
diff --git a/unsupported/Platform.c b/unsupported/Platform.c
index 6646398d..5bf1a2de 100644
--- a/unsupported/Platform.c
+++ b/unsupported/Platform.c
@@ -28,7 +28,7 @@ const SignalItem Platform_signals[] = {
 
 const unsigned int Platform_numberOfSignals = ARRAYSIZE(Platform_signals);
 
-ProcessField Platform_defaultFields[] = { PID, USER, PRIORITY, NICE, M_SIZE, M_RESIDENT, STATE, PERCENT_CPU, PERCENT_MEM, TIME, COMM, 0 };
+ProcessField Platform_defaultFields[] = { PID, USER, PRIORITY, NICE, M_VIRT, M_RESIDENT, STATE, PERCENT_CPU, PERCENT_MEM, TIME, COMM, 0 };
 
 ProcessFieldData Process_fields[] = {
    [0] = { .name = "", .title = NULL, .description = NULL, .flags = 0, },
@@ -47,7 +47,7 @@ ProcessFieldData Process_fields[] = {
    [STARTTIME] = { .name = "STARTTIME", .title = "START ", .description = "Time the process was started", .flags = 0, },
 
    [PROCESSOR] = { .name = "PROCESSOR", .title = "CPU ", .description = "Id of the CPU the process last executed on", .flags = 0, },
-   [M_SIZE] = { .name = "M_SIZE", .title = " VIRT ", .description = "Total program size in virtual memory", .flags = 0, },
+   [M_VIRT] = { .name = "M_VIRT", .title = " VIRT ", .description = "Total program size in virtual memory", .flags = 0, },
    [M_RESIDENT] = { .name = "M_RESIDENT", .title = "  RES ", .description = "Resident set size, size of the text and data sections, plus stack usage", .flags = 0, },
    [ST_UID] = { .name = "ST_UID", .title = "  UID ", .description = "User ID of the process owner", .flags = 0, },
    [PERCENT_CPU] = { .name = "PERCENT_CPU", .title = "CPU% ", .description = "Percentage of the CPU time the process used in the last sampling", .flags = 0, },
diff --git a/unsupported/UnsupportedProcessList.c b/unsupported/UnsupportedProcessList.c
index 6c0e0229..098eb488 100644
--- a/unsupported/UnsupportedProcessList.c
+++ b/unsupported/UnsupportedProcessList.c
@@ -65,7 +65,7 @@ void ProcessList_goThroughEntries(ProcessList* super, bool pauseProcessUpdate) {
    proc->starttime_ctime = 1433116800; // Jun 01, 2015
    Process_fillStarttimeBuffer(proc);
 
-   proc->m_size = 100;
+   proc->m_virt = 100;
    proc->m_resident = 100;
 
    proc->minflt = 20;