diff --git a/skynet-src/socket_server.c b/skynet-src/socket_server.c
index 76e900a4..f8dc607e 100644
--- a/skynet-src/socket_server.c
+++ b/skynet-src/socket_server.c
@@ -689,6 +689,7 @@ socket_server_poll(struct socket_server *ss, struct socket_message * result, int
 			}
 			ss->event_index = 0;
 			if (ss->event_n <= 0) {
+				ss->event_n = 0;
 				return -1;
 			}
 		}