diff --git a/linphone/mediastreamer2/src/msrtp.c b/linphone/mediastreamer2/src/msrtp.c
index 6276a120c3699fb0e2c229f0cc682049752d1b21..79a4a3fadd117d66bdaa507644ef022bdf810ac6 100644
--- a/linphone/mediastreamer2/src/msrtp.c
+++ b/linphone/mediastreamer2/src/msrtp.c
@@ -55,7 +55,7 @@ static void sender_init(MSFilter * f)
 	d->rate = 8000;
 	d->dtmf = 0;
 	d->dtmf_start = FALSE;
-	d->dtmf_duration = 1600; //480;
+	d->dtmf_duration = 800;
 	d->mute_mic=FALSE;
 	d->relay_session_id_size=0;
 	d->last_rsi_time=0;