diff --git a/Settings.c b/Settings.c
index 4b76d612..278f0382 100644
--- a/Settings.c
+++ b/Settings.c
@@ -293,7 +293,7 @@ static ScreenSettings* Settings_defaultScreens(Settings* this) {
    if (this->nScreens)
       return this->screens[0];
    for (unsigned int i = 0; i < Platform_numberOfDefaultScreens; i++) {
-      ScreenDefaults* defaults = &Platform_defaultScreens[i];
+      const ScreenDefaults* defaults = &Platform_defaultScreens[i];
       ScreenSettings* settings = Settings_newScreen(this, defaults->name, defaults->columns);
       settings->sortKey = toFieldIndex(this->dynamicColumns, defaults->sortKey);
    }
diff --git a/darwin/Platform.c b/darwin/Platform.c
index dcdee1a5..acc3081a 100644
--- a/darwin/Platform.c
+++ b/darwin/Platform.c
@@ -49,7 +49,7 @@ in the source distribution for its full text.
 #endif
 
 
-ScreenDefaults Platform_defaultScreens[] = {
+const ScreenDefaults Platform_defaultScreens[] = {
    {
       .name = "Main",
       .columns = "PID USER PRIORITY NICE M_VIRT M_RESIDENT STATE PERCENT_CPU PERCENT_MEM TIME COMM",
diff --git a/darwin/Platform.h b/darwin/Platform.h
index 0022478f..4f8e7c9d 100644
--- a/darwin/Platform.h
+++ b/darwin/Platform.h
@@ -26,7 +26,7 @@ in the source distribution for its full text.
 #include "generic/uname.h"
 
 
-extern ScreenDefaults Platform_defaultScreens[];
+extern const ScreenDefaults Platform_defaultScreens[];
 
 extern const unsigned int Platform_numberOfDefaultScreens;
 
diff --git a/dragonflybsd/Platform.c b/dragonflybsd/Platform.c
index 6672a776..53727823 100644
--- a/dragonflybsd/Platform.c
+++ b/dragonflybsd/Platform.c
@@ -32,7 +32,7 @@ in the source distribution for its full text.
 #include "dragonflybsd/DragonFlyBSDProcess.h"
 #include "dragonflybsd/DragonFlyBSDProcessList.h"
 
-ScreenDefaults Platform_defaultScreens[] = {
+const ScreenDefaults Platform_defaultScreens[] = {
    {
       .name = "Main",
       .columns = "PID USER PRIORITY NICE M_VIRT M_RESIDENT STATE PERCENT_CPU PERCENT_MEM TIME COMM",
diff --git a/dragonflybsd/Platform.h b/dragonflybsd/Platform.h
index f40d5a83..ec140ad0 100644
--- a/dragonflybsd/Platform.h
+++ b/dragonflybsd/Platform.h
@@ -29,7 +29,7 @@ in the source distribution for its full text.
 #include "generic/uname.h"
 
 
-extern ScreenDefaults Platform_defaultScreens[];
+extern const ScreenDefaults Platform_defaultScreens[];
 
 extern const unsigned int Platform_numberOfDefaultScreens;
 
diff --git a/freebsd/Platform.c b/freebsd/Platform.c
index eff30855..3cfe5db7 100644
--- a/freebsd/Platform.c
+++ b/freebsd/Platform.c
@@ -50,7 +50,7 @@ in the source distribution for its full text.
 #include "zfs/ZfsArcMeter.h"
 #include "zfs/ZfsCompressedArcMeter.h"
 
-ScreenDefaults Platform_defaultScreens[] = {
+const ScreenDefaults Platform_defaultScreens[] = {
    {
       .name = "Main",
       .columns = "PID USER PRIORITY NICE M_VIRT M_RESIDENT STATE PERCENT_CPU PERCENT_MEM TIME COMM",
diff --git a/freebsd/Platform.h b/freebsd/Platform.h
index f5ab27df..c0292d9a 100644
--- a/freebsd/Platform.h
+++ b/freebsd/Platform.h
@@ -25,7 +25,7 @@ in the source distribution for its full text.
 #include "generic/uname.h"
 
 
-extern ScreenDefaults Platform_defaultScreens[];
+extern const ScreenDefaults Platform_defaultScreens[];
 
 extern const unsigned int Platform_numberOfDefaultScreens;
 
diff --git a/linux/Platform.c b/linux/Platform.c
index 8253817a..2200e478 100644
--- a/linux/Platform.c
+++ b/linux/Platform.c
@@ -83,7 +83,7 @@ enum CapMode {
 };
 #endif
 
-ScreenDefaults Platform_defaultScreens[] = {
+const ScreenDefaults Platform_defaultScreens[] = {
    {
       .name = "Main",
       .columns = "PID USER PRIORITY NICE M_VIRT M_RESIDENT M_SHARE STATE PERCENT_CPU PERCENT_MEM TIME COMM",
diff --git a/linux/Platform.h b/linux/Platform.h
index 5c16e70f..f2c314f5 100644
--- a/linux/Platform.h
+++ b/linux/Platform.h
@@ -38,7 +38,7 @@ in the source distribution for its full text.
 #endif
 
 
-extern ScreenDefaults Platform_defaultScreens[];
+extern const ScreenDefaults Platform_defaultScreens[];
 
 extern const unsigned int Platform_numberOfDefaultScreens;
 
diff --git a/netbsd/Platform.c b/netbsd/Platform.c
index d95be9d9..f442fe78 100644
--- a/netbsd/Platform.c
+++ b/netbsd/Platform.c
@@ -66,7 +66,7 @@ in the source distribution for its full text.
 #define prop_number_signed_value prop_number_integer_value
 #endif
 
-ScreenDefaults Platform_defaultScreens[] = {
+const ScreenDefaults Platform_defaultScreens[] = {
    {
       .name = "Main",
       .columns = "PID USER PRIORITY NICE M_VIRT M_RESIDENT STATE PERCENT_CPU PERCENT_MEM TIME COMM",
diff --git a/netbsd/Platform.h b/netbsd/Platform.h
index 428eb15a..3ad51e28 100644
--- a/netbsd/Platform.h
+++ b/netbsd/Platform.h
@@ -34,7 +34,7 @@ in the source distribution for its full text.
 #define PLATFORM_LONG_OPTIONS \
    // End of list
 
-extern ScreenDefaults Platform_defaultScreens[];
+extern const ScreenDefaults Platform_defaultScreens[];
 
 extern const unsigned int Platform_numberOfDefaultScreens;
 
diff --git a/openbsd/Platform.c b/openbsd/Platform.c
index b8e7ce91..ce227872 100644
--- a/openbsd/Platform.c
+++ b/openbsd/Platform.c
@@ -46,7 +46,7 @@ in the source distribution for its full text.
 #include "openbsd/OpenBSDProcessList.h"
 
 
-ScreenDefaults Platform_defaultScreens[] = {
+const ScreenDefaults Platform_defaultScreens[] = {
    {
       .name = "Main",
       .columns = "PID USER PRIORITY NICE M_VIRT M_RESIDENT STATE PERCENT_CPU PERCENT_MEM TIME COMM",
diff --git a/openbsd/Platform.h b/openbsd/Platform.h
index b3612cc6..e3d61163 100644
--- a/openbsd/Platform.h
+++ b/openbsd/Platform.h
@@ -26,7 +26,7 @@ in the source distribution for its full text.
 #include "generic/uname.h"
 
 
-extern ScreenDefaults Platform_defaultScreens[];
+extern const ScreenDefaults Platform_defaultScreens[];
 
 extern const unsigned int Platform_numberOfDefaultScreens;
 
diff --git a/pcp/Platform.c b/pcp/Platform.c
index 952ec7ca..6845207b 100644
--- a/pcp/Platform.c
+++ b/pcp/Platform.c
@@ -54,7 +54,7 @@ in the source distribution for its full text.
 
 Platform* pcp;
 
-ScreenDefaults Platform_defaultScreens[] = {
+const ScreenDefaults Platform_defaultScreens[] = {
    {
       .name = "Main",
       .columns = "PID USER PRIORITY NICE M_VIRT M_RESIDENT M_SHARE STATE PERCENT_CPU PERCENT_MEM TIME COMM",
diff --git a/pcp/Platform.h b/pcp/Platform.h
index 242e742e..dc51c736 100644
--- a/pcp/Platform.h
+++ b/pcp/Platform.h
@@ -58,7 +58,7 @@ typedef struct Platform_ {
    unsigned int ncpu;         /* maximum processor count configured */
 } Platform;
 
-extern ScreenDefaults Platform_defaultScreens[];
+extern const ScreenDefaults Platform_defaultScreens[];
 
 extern const unsigned int Platform_numberOfDefaultScreens;
 
diff --git a/solaris/Platform.c b/solaris/Platform.c
index 15917c94..e852ccfc 100644
--- a/solaris/Platform.c
+++ b/solaris/Platform.c
@@ -40,7 +40,7 @@ in the source distribution for its full text.
 #include "SolarisProcessList.h"
 
 
-ScreenDefaults Platform_defaultScreens[] = {
+const ScreenDefaults Platform_defaultScreens[] = {
    {
       .name = "Default",
       .columns = "PID LWPID USER PRIORITY NICE M_VIRT M_RESIDENT STATE PERCENT_CPU PERCENT_MEM TIME COMM",
diff --git a/solaris/Platform.h b/solaris/Platform.h
index 6bd8179b..1b3dc9f5 100644
--- a/solaris/Platform.h
+++ b/solaris/Platform.h
@@ -52,7 +52,7 @@ typedef struct envAccum_ {
    char* env;
 } envAccum;
 
-extern ScreenDefaults Platform_defaultScreens[];
+extern const ScreenDefaults Platform_defaultScreens[];
 
 extern const unsigned int Platform_numberOfDefaultScreens;