diff --git a/skynet-src/skynet_monitor.c b/skynet-src/skynet_monitor.c
index 6e46d2ff..7d6c3cd6 100644
--- a/skynet-src/skynet_monitor.c
+++ b/skynet-src/skynet_monitor.c
@@ -36,7 +36,7 @@ skynet_monitor_check(struct skynet_monitor *sm) {
 	if (sm->version == sm->check_version) {
 		if (sm->destination) {
 			skynet_context_endless(sm->destination);
-			skynet_error(NULL, "A message from [ :%08x ] to [ :%08x ] maybe in an endless loop", sm->source , sm->destination);
+			skynet_error(NULL, "A message from [ :%08x ] to [ :%08x ] maybe in an endless loop (version = %d)", sm->source , sm->destination, sm->version);
 		}
 	} else {
 		sm->check_version = sm->version;