diff --git a/darwin/Platform.c b/darwin/Platform.c
index 9274d0d806d5f1823455983891df45df724588f7..e6a435c0cd067ce4d2ce298ed31eeb2587cbe929 100644
--- a/darwin/Platform.c
+++ b/darwin/Platform.c
@@ -33,7 +33,7 @@ in the source distribution for its full text.
 
 ProcessField Platform_defaultFields[] = { PID, USER, PRIORITY, NICE, M_SIZE, M_RESIDENT, STATE, PERCENT_CPU, PERCENT_MEM, TIME, COMM, 0 };
 
-SignalItem Platform_signals[] = {
+const SignalItem Platform_signals[] = {
    { .name = " 0 Cancel",    .number =  0 },
    { .name = " 1 SIGHUP",    .number =  1 },
    { .name = " 2 SIGINT",    .number =  2 },
@@ -69,7 +69,7 @@ SignalItem Platform_signals[] = {
    { .name = "31 SIGUSR2",   .number = 31 },
 };
 
-unsigned int Platform_numberOfSignals = sizeof(Platform_signals)/sizeof(SignalItem);
+const unsigned int Platform_numberOfSignals = sizeof(Platform_signals)/sizeof(SignalItem);
 
 ProcessFieldData Process_fields[] = {
    [0] = { .name = "", .title = NULL, .description = NULL, .flags = 0, },
diff --git a/darwin/Platform.h b/darwin/Platform.h
index 29ef289deb7668cae031061bac8eea9ddae5b413..1231217b18343ebea542422820cd5c6132059e95 100644
--- a/darwin/Platform.h
+++ b/darwin/Platform.h
@@ -22,9 +22,9 @@ in the source distribution for its full text.
 
 extern ProcessField Platform_defaultFields[];
 
-extern SignalItem Platform_signals[];
+extern const SignalItem Platform_signals[];
 
-extern unsigned int Platform_numberOfSignals;
+extern const unsigned int Platform_numberOfSignals;
 
 extern ProcessFieldData Process_fields[];
 
diff --git a/freebsd/Platform.c b/freebsd/Platform.c
index f02daa5a867d4ad821a0cc9a25b1e0a426f0ad67..5dd6ca41a2585b6a250f1656323336532315c507 100644
--- a/freebsd/Platform.c
+++ b/freebsd/Platform.c
@@ -43,7 +43,7 @@ ProcessField Platform_defaultFields[] = { PID, USER, PRIORITY, NICE, M_SIZE, M_R
 
 int Platform_numberOfFields = LAST_PROCESSFIELD;
 
-SignalItem Platform_signals[] = {
+const SignalItem Platform_signals[] = {
    { .name = " 0 Cancel",    .number =  0 },
    { .name = " 1 SIGHUP",    .number =  1 },
    { .name = " 2 SIGINT",    .number =  2 },
@@ -80,7 +80,7 @@ SignalItem Platform_signals[] = {
    { .name = "33 SIGLIBRT",  .number = 33 },
 };
 
-unsigned int Platform_numberOfSignals = sizeof(Platform_signals)/sizeof(SignalItem);
+const unsigned int Platform_numberOfSignals = sizeof(Platform_signals)/sizeof(SignalItem);
 
 void Platform_setBindings(Htop_Action* keys) {
    (void) keys;
diff --git a/freebsd/Platform.h b/freebsd/Platform.h
index ecc0dcd48f3d0be5afc44bfb6bbdbda903447f0f..1735e7e3b6344de51b69bcfddf48a43d0e99e836 100644
--- a/freebsd/Platform.h
+++ b/freebsd/Platform.h
@@ -24,9 +24,9 @@ extern ProcessField Platform_defaultFields[];
 
 extern int Platform_numberOfFields;
 
-extern SignalItem Platform_signals[];
+extern const SignalItem Platform_signals[];
 
-extern unsigned int Platform_numberOfSignals;
+extern const unsigned int Platform_numberOfSignals;
 
 void Platform_setBindings(Htop_Action* keys);
 
diff --git a/linux/Platform.c b/linux/Platform.c
index 04360ca37b4cdd79bc7fb61a66b586006baace15..de7bb84f532b158ac74e14ba85b84798bed208b7 100644
--- a/linux/Platform.c
+++ b/linux/Platform.c
@@ -47,7 +47,7 @@ ProcessField Platform_defaultFields[] = { PID, USER, PRIORITY, NICE, M_SIZE, M_R
 
 int Platform_numberOfFields = LAST_PROCESSFIELD;
 
-SignalItem Platform_signals[] = {
+const SignalItem Platform_signals[] = {
    { .name = " 0 Cancel",    .number = 0 },
    { .name = " 1 SIGHUP",    .number = 1 },
    { .name = " 2 SIGINT",    .number = 2 },
@@ -84,7 +84,7 @@ SignalItem Platform_signals[] = {
    { .name = "31 SIGSYS",    .number = 31 },
 };
 
-unsigned int Platform_numberOfSignals = sizeof(Platform_signals)/sizeof(SignalItem);
+const unsigned int Platform_numberOfSignals = sizeof(Platform_signals)/sizeof(SignalItem);
 
 static Htop_Reaction Platform_actionSetIOPriority(State* st) {
    Panel* panel = st->panel;
diff --git a/linux/Platform.h b/linux/Platform.h
index b0d69fb798806e775a714c1e5f8be86514bedeee..b0456e5b5590a893317fb445ece567fd8d573e4d 100644
--- a/linux/Platform.h
+++ b/linux/Platform.h
@@ -23,9 +23,9 @@ extern ProcessField Platform_defaultFields[];
 
 extern int Platform_numberOfFields;
 
-extern SignalItem Platform_signals[];
+extern const SignalItem Platform_signals[];
 
-extern unsigned int Platform_numberOfSignals;
+extern const unsigned int Platform_numberOfSignals;
 
 void Platform_setBindings(Htop_Action* keys);
 
diff --git a/openbsd/Platform.c b/openbsd/Platform.c
index 9273abc08c4bc98e135fe84237825ef595398fd2..01b6c4786d55f9f73e8a477e224b0f52c97acdb4 100644
--- a/openbsd/Platform.c
+++ b/openbsd/Platform.c
@@ -99,7 +99,7 @@ int Platform_numberOfFields = LAST_PROCESSFIELD;
 /*
  * See /usr/include/sys/signal.h
  */
-SignalItem Platform_signals[] = {
+const SignalItem Platform_signals[] = {
    { .name = " 0 Cancel",    .number =  0 },
    { .name = " 1 SIGHUP",    .number =  1 },
    { .name = " 2 SIGINT",    .number =  2 },
@@ -136,7 +136,7 @@ SignalItem Platform_signals[] = {
    { .name = "32 SIGTHR",    .number = 32 },
 };
 
-unsigned int Platform_numberOfSignals = sizeof(Platform_signals)/sizeof(SignalItem);
+const unsigned int Platform_numberOfSignals = sizeof(Platform_signals)/sizeof(SignalItem);
 
 void Platform_setBindings(Htop_Action* keys) {
    (void) keys;
diff --git a/openbsd/Platform.h b/openbsd/Platform.h
index 6665093d2dff166fcc3915b9377dd570bfb1a0b8..e0da7b9ffcd8ba4722de9632e8d721c8afbad769 100644
--- a/openbsd/Platform.h
+++ b/openbsd/Platform.h
@@ -39,9 +39,9 @@ extern int Platform_numberOfFields;
 /*
  * See /usr/include/sys/signal.h
  */
-extern SignalItem Platform_signals[];
+extern const SignalItem Platform_signals[];
 
-extern unsigned int Platform_numberOfSignals;
+extern const unsigned int Platform_numberOfSignals;
 
 void Platform_setBindings(Htop_Action* keys);
 
diff --git a/unsupported/Platform.c b/unsupported/Platform.c
index 04e8b4e77f2708b05d5abc421b197a79a0cafc23..30726859c7c0dc3083006676f686144fc939ad99 100644
--- a/unsupported/Platform.c
+++ b/unsupported/Platform.c
@@ -23,11 +23,11 @@ in the source distribution for its full text.
 #include "UnsupportedProcess.h"
 }*/
 
-SignalItem Platform_signals[] = {
+const SignalItem Platform_signals[] = {
    { .name = " 0 Cancel",    .number =  0 },
 };
 
-unsigned int Platform_numberOfSignals = sizeof(Platform_signals)/sizeof(SignalItem);
+const unsigned int Platform_numberOfSignals = sizeof(Platform_signals)/sizeof(SignalItem);
 
 ProcessField Platform_defaultFields[] = { PID, USER, PRIORITY, NICE, M_SIZE, M_RESIDENT, STATE, PERCENT_CPU, PERCENT_MEM, TIME, COMM, 0 };
 
diff --git a/unsupported/Platform.h b/unsupported/Platform.h
index b1fa91d666b12736cc4d2c73598336f792cdc857..14f3d1a6d3830013067c92aae6d7d9f500d40f01 100644
--- a/unsupported/Platform.h
+++ b/unsupported/Platform.h
@@ -15,9 +15,9 @@ in the source distribution for its full text.
 #include "SignalsPanel.h"
 #include "UnsupportedProcess.h"
 
-extern SignalItem Platform_signals[];
+extern const SignalItem Platform_signals[];
 
-extern unsigned int Platform_numberOfSignals;
+extern const unsigned int Platform_numberOfSignals;
 
 extern ProcessField Platform_defaultFields[];