diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index d13fda4d0a22bd8a2c528e025e78f739694b67ac..5b9ed022b012f506bd149412bc3fcdd7f8a447ad 100644
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -10418,6 +10418,7 @@ static int handle_request_invite(struct sip_pvt *p, struct sip_request *req, int
 		if (required_profile) { 	/* They require something */
 			/* At this point we support no extensions, so fail */
 			transmit_response_with_unsupported(p, "420 Bad extension", req, required);
+			ast_log(LOG_WARNING,"Received SIP INVITE with unsupported required extension: %s\n", required);
 			if (!p->lastinvite)
 				ast_set_flag(p, SIP_NEEDDESTROY);	
 			return -1;