diff --git a/channels/chan_iax2.c b/channels/chan_iax2.c
index 1458307c1b28cebfc275112f08b2f10c796cbe05..6743283a149b7443e85c14eea3ca4633784e0874 100755
--- a/channels/chan_iax2.c
+++ b/channels/chan_iax2.c
@@ -3573,6 +3573,7 @@ static int update_registry(char *name, struct sockaddr_in *sin, int callno)
 			p->expire = ast_sched_add(sched, p->expirey * 1000, expire_registry, (void *)p);
 		iax_ie_append_str(&ied, IAX_IE_USERNAME, p->name);
 		iax_ie_append_short(&ied, IAX_IE_REFRESH, p->expirey);
+		iax_ie_append_int(&ied, IAX_IE_DATETIME, iax2_datetime());
 		iax_ie_append_addr(&ied, IAX_IE_APPARENT_ADDR, &p->addr);
 		if (strlen(p->mailbox)) {
 			msgcount = ast_app_has_voicemail(p->mailbox);