diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index 34c9d4c5a9..078aa70813 100755
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -6266,6 +6266,10 @@ static int sip_dtmfmode(struct ast_channel *chan, void *data)
 {
 	struct sip_pvt *p = chan->pvt->pvt;
 	char *mode;
+	if (strcasecmp(chan->name, "SIP")) {
+		ast_log(LOG_WARNING, "Call this application only on SIP incoming calls\n");
+		return 0;
+	}
 	if (data)
 		mode = (char *)data;
 	else {