diff --git a/addons/main/script_macros.hpp b/addons/main/script_macros.hpp
index e51d4450a4..1fb4a0b622 100644
--- a/addons/main/script_macros.hpp
+++ b/addons/main/script_macros.hpp
@@ -22,10 +22,13 @@
 
 #define PATHTOEF(var1,var2) PATHTOF_SYS(PREFIX,var1,var2)
 
-#define LSTRING(var1) QUOTE(TRIPLES(STR,ADDON,var1))
-#define LESTRING(var1,var2) QUOTE(TRIPLES(STR,DOUBLES(PREFIX,var1),var2))
-#define CSTRING(var1) QUOTE(TRIPLES($STR,ADDON,var1))
-#define ECSTRING(var1,var2) QUOTE(TRIPLES($STR,DOUBLES(PREFIX,var1),var2))
+#ifndef STRING_MACROS_GUARD
+#define STRING_MACROS_GUARD
+    #define LSTRING(var1) QUOTE(TRIPLES(STR,ADDON,var1))
+    #define LESTRING(var1,var2) QUOTE(TRIPLES(STR,DOUBLES(PREFIX,var1),var2))
+    #define CSTRING(var1) QUOTE(TRIPLES($STR,ADDON,var1))
+    #define ECSTRING(var1,var2) QUOTE(TRIPLES($STR,DOUBLES(PREFIX,var1),var2))
+#endif
 
 #define GETVAR_SYS(var1,var2) getVariable [ARR_2(QUOTE(var1),var2)]
 #define SETVAR_SYS(var1,var2) setVariable [ARR_2(QUOTE(var1),var2)]