--- g15macro-1.0.5/g15macro.c
+++ g15macro-1.0.5/g15macro.c
@@ -188,7 +188,7 @@
     XK_abovedot
 };
 
-int map_gkey(keystate){
+int map_gkey(int keystate){
     int retval = -1;
     switch(keystate){
         case G15_KEY_G1:  retval = 0;   break;