diff --git a/modules/topoh/th_msg.c b/modules/topoh/th_msg.c
index 731d831..619d408 100644
--- a/modules/topoh/th_msg.c
+++ b/modules/topoh/th_msg.c
@@ -1033,7 +1033,8 @@ int th_route_direction(sip_msg_t *msg)
 
 int th_skip_msg(sip_msg_t *msg)
 {
-	if((get_cseq(msg)->method_id)&(METHOD_REGISTER|METHOD_PUBLISH))
+
+	if(get_cseq(msg) && ((get_cseq(msg)->method_id)&(METHOD_REGISTER|METHOD_PUBLISH)))
 		return 1;
 
 	return 0;