diff --git a/std/thing/light.c b/std/thing/light.c
index d02f579..bd6f9b6 100644
--- a/std/thing/light.c
+++ b/std/thing/light.c
@@ -66,7 +66,7 @@
 //                       ##############
 
 // Lichttypen pruefen
-varargs int CheckLightType(int lighttype, int mode)
+public varargs int CheckLightType(int lighttype, int mode)
 {
   int my_light_type = QueryProp(P_LIGHT_TYPE);