diff --git a/src/if_lua.c b/src/if_lua.c
index 148d624..b4789c4 100644
--- a/src/if_lua.c
+++ b/src/if_lua.c
@@ -1547,6 +1547,7 @@
 	abort = set_ref_in_item(&tv, copyID, NULL, NULL);
     }
     lua_pushinteger(L, abort);
+    return 0;
 }
 
     static int