diff --git a/linux/LinuxProcessList.c b/linux/LinuxProcessList.c
index 2f17974a..cf91900b 100644
--- a/linux/LinuxProcessList.c
+++ b/linux/LinuxProcessList.c
@@ -477,7 +477,7 @@ static bool LinuxProcessList_readSmapsFile(LinuxProcess* process, const char* di
 #ifdef HAVE_OPENVZ
 
 static void LinuxProcessList_readOpenVZData(LinuxProcess* process, const char* dirname, const char* name) {
-   if ( (access("/proc/vz", R_OK) != 0)) {
+   if ( (access(PROCDIR "/vz", R_OK) != 0)) {
       process->vpid = process->super.pid;
       process->ctid = 0;
       return;
diff --git a/linux/Platform.c b/linux/Platform.c
index e82d8f88..0545fc46 100644
--- a/linux/Platform.c
+++ b/linux/Platform.c
@@ -230,8 +230,8 @@ void Platform_setZfsCompressedArcValues(Meter* this) {
    ZfsCompressedArcMeter_readStats(this, &(lpl->zfs));
 }
 char* Platform_getProcessEnv(pid_t pid) {
-   char procname[32+1];
-   xSnprintf(procname, 32, "/proc/%d/environ", pid);
+   char procname[128];
+   xSnprintf(procname, sizeof(procname), PROCDIR "/%d/environ", pid);
    FILE* fd = fopen(procname, "r");
    char *env = NULL;
    if (fd) {