diff --git a/src/light.c b/src/light.c
index b041000f5..d970dd543 100644
--- a/src/light.c
+++ b/src/light.c
@@ -578,7 +578,6 @@ struct obj *obj;
 }
 
 #ifdef WIZARD
-extern char *FDECL(fmt_ptr, (const genericptr, char *));  /* from alloc.c */
 
 int
 wiz_light_sources()