diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index ff0d18d2a7..44f2a536e6 100644
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -18639,7 +18639,7 @@ static int build_reply_digest(struct sip_pvt *p, int method, char* digest, int d
 	else if (!ast_strlen_zero(p->uri))
 		ast_copy_string(uri, p->uri, sizeof(uri));
 	else
-		snprintf(uri, sizeof(uri), "sip:%s@%s", p->username, ast_sockaddr_stringify_host_remote(&p->sa));
+		snprintf(uri, sizeof(uri), "%s:%s@%s", p->socket.type == SIP_TRANSPORT_TLS ? "sips" : "sip", p->username, ast_sockaddr_stringify_host_remote(&p->sa));
 
 	snprintf(cnonce, sizeof(cnonce), "%08lx", ast_random());