diff --git a/src/server/ns_turn_server.c b/src/server/ns_turn_server.c
index b8968a9..bdca6c8 100644
--- a/src/server/ns_turn_server.c
+++ b/src/server/ns_turn_server.c
@@ -4629,7 +4629,7 @@ static void peer_input_handler(ioa_socket_handle s, int event_type,
 
 	UNUSED_ARG(can_resume);
 
-	if(ioa_socket_tobeclosed(s)) return;
+	if(!s || ioa_socket_tobeclosed(s)) return;
 
 	ts_ur_super_session* ss = (ts_ur_super_session*) arg;
 
@@ -4637,6 +4637,8 @@ static void peer_input_handler(ioa_socket_handle s, int event_type,
 
 	if(ss->to_be_closed) return;
 
+	if(!(ss->client_socket) || ioa_socket_tobeclosed(ss->client_socket)) return;
+
 	turn_turnserver *server = (turn_turnserver*) (ss->server);
 
 	if (!server) return;