diff --git a/service-src/service_snlua.c b/service-src/service_snlua.c
index 462fea82..83ee43d7 100644
--- a/service-src/service_snlua.c
+++ b/service-src/service_snlua.c
@@ -163,7 +163,7 @@ static int
 timing_enable(lua_State *L, int co_index, lua_Number *start_time) {
 	lua_pushvalue(L, co_index);
 	lua_rawget(L, lua_upvalueindex(1));
-	if (lua_isnil(L, -1)) {		// check total time
+	if (lua_isnil(L, -1)) {		// check start time
 		lua_pop(L, 1);
 		return 0;
 	}