diff --git a/src/channels/chan_voicemngr.c b/src/channels/chan_voicemngr.c
index 68628306cb3738fe0ff72c1b8e749758dd2786cb..7ff919967364625db32139dd4a6cb273bf08916e 100644
--- a/src/channels/chan_voicemngr.c
+++ b/src/channels/chan_voicemngr.c
@@ -1643,6 +1643,7 @@ static int chan_voicemngr_classify_rtp_packet(int payload_type) {
 	switch (payload_type) {
 		case RTCP_SR:     return CHAN_VOICEMNGR_RTCP_SR;
 		case RTCP_RR:     return CHAN_VOICEMNGR_RTCP_RR;
+		case RTP_PT_CN:   return CHAN_VOICEMNGR_AUDIO;
 	}
 
 	for (int i=0; i<VOICEMNGR_CODECS_NUM; i++)