diff --git a/platform/src/tcp_stream.cpp b/platform/src/tcp_stream.cpp
index fa33f6a..c2c1486 100644
--- a/platform/src/tcp_stream.cpp
+++ b/platform/src/tcp_stream.cpp
@@ -401,6 +401,7 @@ evutil_socket_t __conn_private_release_fd(struct tfe_conn_private * conn)
 
 static void __conn_private_destory(struct tfe_conn_private * conn)
 {
+	int ret = 0;
 	if (conn->bev)
 	{
 		bufferevent_disable(conn->bev, EV_READ | EV_WRITE);
@@ -415,10 +416,12 @@ static void __conn_private_destory(struct tfe_conn_private * conn)
 
 	if (conn->fd > 0)
 	{
-		assert(evutil_closesocket(conn->fd) >= 0);
+		ret = evutil_closesocket(conn->fd);
+		assert(ret >= 0);
 	}
 
 	free(conn);
+	(void)ret;
 	TFE_PROXY_STAT_INCREASE(STAT_FD_INSTANT_CLOSE, 1);
 }