diff --git a/std/living/light.c b/std/living/light.c
index 90c3aef..ecbc926 100644
--- a/std/living/light.c
+++ b/std/living/light.c
@@ -30,6 +30,7 @@
 {
   if (environment())
     return environment()->QueryProp(P_INT_LIGHT) + QueryProp(P_LIGHT_MODIFIER);
+  return 0;
 }
 
 varargs int CannotSee(int silent)