diff --git a/skynet-src/socket_server.c b/skynet-src/socket_server.c
index cd50de72..3503e0d2 100644
--- a/skynet-src/socket_server.c
+++ b/skynet-src/socket_server.c
@@ -575,6 +575,7 @@ forward_message(struct socket_server *ss, struct socket *s, struct socket_messag
 
 	if (s->type == SOCKET_TYPE_HALFCLOSE) {
 		// discard recv data
+		FREE(buffer);
 		return -1;
 	}