diff --git a/sc2/src/sc2code/libs/reslib.h b/sc2/src/sc2code/libs/reslib.h
index a33166e7f..23c28f99a 100644
--- a/sc2/src/sc2code/libs/reslib.h
+++ b/sc2/src/sc2code/libs/reslib.h
@@ -142,5 +142,7 @@ BOOLEAN res_IsBoolean (const char *key);
 BOOLEAN res_GetBoolean (const char *key);
 void res_PutBoolean (const char *key, BOOLEAN value);
 
+BOOLEAN res_Remove (const char *key);
+
 #endif /* _RESLIB_H */
 
diff --git a/sc2/src/sc2code/libs/resource/mapres.c b/sc2/src/sc2code/libs/resource/mapres.c
index bf07e4b49..3c61389c1 100644
--- a/sc2/src/sc2code/libs/resource/mapres.c
+++ b/sc2/src/sc2code/libs/resource/mapres.c
@@ -42,6 +42,12 @@ res_ClearTables (void)
 	}
 }
 
+BOOLEAN
+res_Remove (const char *key)
+{
+	return (Alist_RemoveString (map, key) != NULL);
+}
+
 /* Type conversion routines. */
 static const char *
 bool2str (BOOLEAN b)