diff --git a/src/switch_rtp.c b/src/switch_rtp.c
index 8a90dca43e..6179d68448 100644
--- a/src/switch_rtp.c
+++ b/src/switch_rtp.c
@@ -5382,7 +5382,8 @@ static void set_dtmf_delay(switch_rtp_t *rtp_session, uint32_t ms, uint32_t max_
 
 	upsamp = ms * (rtp_session->samples_per_second / 1000);
 	max_upsamp = max_ms * (rtp_session->samples_per_second / 1000);
-
+	
+	rtp_session->sending_dtmf = 0;
 	rtp_session->queue_delay = upsamp;
 
 	if (rtp_session->flags[SWITCH_RTP_FLAG_USE_TIMER]) {