diff --git a/service-src/service_harbor.c b/service-src/service_harbor.c
index 3e722fa9..be650521 100644
--- a/service-src/service_harbor.c
+++ b/service-src/service_harbor.c
@@ -421,6 +421,7 @@ push_socket_data(struct harbor *h, const struct skynet_socket_message * message)
 	}
 	if (s == NULL) {
 		skynet_free(message->buffer);
+		((struct skynet_socket_message *)message)->buffer = NULL;
 		skynet_error(h->ctx, "Invalid socket fd (%d) data", fd);
 		return;
 	}