diff --git a/net/tipc/topsrv.c b/net/tipc/topsrv.c
index b84c0059214f5ca17b950bd4232138e01a516d24..d65eed88c495fba628e9f437ebc3eb6344d8358b 100644
--- a/net/tipc/topsrv.c
+++ b/net/tipc/topsrv.c
@@ -404,7 +404,7 @@ static int tipc_conn_rcv_from_sock(struct tipc_conn *con)
 	ret = sock_recvmsg(con->sock, &msg, MSG_DONTWAIT);
 	if (ret == -EWOULDBLOCK)
 		return -EWOULDBLOCK;
-	if (ret > 0) {
+	if (ret == sizeof(s)) {
 		read_lock_bh(&sk->sk_callback_lock);
 		ret = tipc_conn_rcv_sub(srv, con, &s);
 		read_unlock_bh(&sk->sk_callback_lock);