diff --git a/skynet-src/skynet_harbor.c b/skynet-src/skynet_harbor.c
index 1e9b771d..a666c699 100644
--- a/skynet-src/skynet_harbor.c
+++ b/skynet-src/skynet_harbor.c
@@ -34,7 +34,7 @@ skynet_harbor_register(struct remote_name *rname) {
 
 int 
 skynet_harbor_message_isremote(uint32_t handle) {
-	return !(handle & HARBOR);
+	return (handle & ~HANDLE_MASK) != HARBOR;
 }
 
 void