diff --git a/source/src/command.cpp b/source/src/command.cpp
index 5b483cbd..f8ea0ee9 100644
--- a/source/src/command.cpp
+++ b/source/src/command.cpp
@@ -128,6 +128,19 @@ void setvar(const char *name, int i) { *idents->access(name)->storage.i = i; }
 int getvar(const char *name) { return *idents->access(name)->storage.i; }
 bool identexists(const char *name) { return idents->access(name)!=NULL; }
 
+void touchvar(const char *name)
+{
+    ident *id = idents->access(name);
+    if(id) switch(id->type)
+    {
+        case ID_VAR:
+        case ID_FVAR:
+        case ID_SVAR:
+            if(id->fun) ((void (__cdecl *)())id->fun)();            // call trigger function if available
+            break;
+    }
+}
+
 const char *getalias(const char *name)
 {
     ident *i = idents->access(name);
diff --git a/source/src/main.cpp b/source/src/main.cpp
index f63d9d2b..ab9c8c7a 100644
--- a/source/src/main.cpp
+++ b/source/src/main.cpp
@@ -297,6 +297,8 @@ void resetgl()
     setupscreen(usedcolorbits, useddepthbits, usedfsaa);
     gl_init(scr_w, scr_h, usedcolorbits, useddepthbits, usedfsaa);
 
+    touchvar("gamma");
+
     extern void reloadfonts();
     extern void reloadtextures();
     c2skeepalive();
diff --git a/source/src/protos.h b/source/src/protos.h
index 1315932b..35da3894 100644
--- a/source/src/protos.h
+++ b/source/src/protos.h
@@ -23,6 +23,7 @@ struct color
 extern bool persistidents;
 extern int variable(const char *name, int min, int cur, int max, int *storage, void (*fun)(), bool persist);
 extern void setvar(const char *name, int i);
+extern void touchvar(const char *name);
 extern int getvar(const char *name);
 extern bool identexists(const char *name);
 extern bool addcommand(const char *name, void (*fun)(), int narg);