diff --git a/lualib-src/lua-skynet.c b/lualib-src/lua-skynet.c
index c92ff98d..7d75d2ce 100644
--- a/lualib-src/lua-skynet.c
+++ b/lualib-src/lua-skynet.c
@@ -172,6 +172,9 @@ _send(lua_State *L) {
 	uint32_t dest = (uint32_t)lua_tointeger(L, 1);
 	const char * dest_string = NULL;
 	if (dest == 0) {
+		if (lua_type(L,1) == LUA_TNUMBER) {
+			return luaL_error(L, "Invalid service address 0");
+		}
 		dest_string = get_dest_string(L, 1);
 	}