diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index 7a091ce8a0..55e8a9557b 100755
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -8400,6 +8400,7 @@ static struct sip_user *build_user(const char *name, struct ast_variable *v)
 		user->canreinvite = global_canreinvite;
 		ast_copy_flags(user, (&global_flags), SIP_TRUSTRPID);
 		user->dtmfmode = global_dtmfmode;
+		user->nat = global_nat;
 		user->progressinband = global_progressinband;
 		user->prefs = prefs;
 #ifdef OSP_SUPPORT