diff --git a/trunk/src/app/srs_app_rtc_conn.cpp b/trunk/src/app/srs_app_rtc_conn.cpp
index a5a0bdd5a..6f4294d33 100644
--- a/trunk/src/app/srs_app_rtc_conn.cpp
+++ b/trunk/src/app/srs_app_rtc_conn.cpp
@@ -1211,12 +1211,12 @@ srs_error_t SrsRtcPublishStream::do_on_rtp(char* plaintext, int nb_plaintext)
     SrsRtcVideoRecvTrack* video_track = get_video_track(ssrc);
     if (audio_track) {
         pkt->frame_type = SrsFrameTypeAudio;
-        if ((err = audio_track->on_rtp(source, pkt)) != srs_success) {
+        if ((err = audio_track->on_rtp(source, pkt, nack_enabled_)) != srs_success) {
             return srs_error_wrap(err, "on audio");
         }
     } else if (video_track) {
         pkt->frame_type = SrsFrameTypeVideo;
-        if ((err = video_track->on_rtp(source, pkt)) != srs_success) {
+        if ((err = video_track->on_rtp(source, pkt, nack_enabled_)) != srs_success) {
             return srs_error_wrap(err, "on video");
         }
     } else {
diff --git a/trunk/src/app/srs_app_rtc_source.cpp b/trunk/src/app/srs_app_rtc_source.cpp
index a77975b98..020d139ff 100644
--- a/trunk/src/app/srs_app_rtc_source.cpp
+++ b/trunk/src/app/srs_app_rtc_source.cpp
@@ -1841,7 +1841,7 @@ void SrsRtcAudioRecvTrack::on_before_decode_payload(SrsRtpPacket2* pkt, SrsBuffe
     *ppayload = new SrsRtpRawPayload();
 }
 
-srs_error_t SrsRtcAudioRecvTrack::on_rtp(SrsRtcStream* source, SrsRtpPacket2* pkt)
+srs_error_t SrsRtcAudioRecvTrack::on_rtp(SrsRtcStream* source, SrsRtpPacket2* pkt, bool nack_enabled)
 {
     srs_error_t err = srs_success;
 
@@ -1857,7 +1857,7 @@ srs_error_t SrsRtcAudioRecvTrack::on_rtp(SrsRtcStream* source, SrsRtpPacket2* pk
     }
 
     // For NACK to handle packet.
-    if ((err = on_nack(pkt)) != srs_success) {
+    if (nack_enabled && (err = on_nack(pkt)) != srs_success) {
         return srs_error_wrap(err, "on nack");
     }
 
@@ -1902,7 +1902,7 @@ void SrsRtcVideoRecvTrack::on_before_decode_payload(SrsRtpPacket2* pkt, SrsBuffe
     }
 }
 
-srs_error_t SrsRtcVideoRecvTrack::on_rtp(SrsRtcStream* source, SrsRtpPacket2* pkt)
+srs_error_t SrsRtcVideoRecvTrack::on_rtp(SrsRtcStream* source, SrsRtpPacket2* pkt, bool nack_enabled)
 {
     srs_error_t err = srs_success;
 
@@ -1920,7 +1920,7 @@ srs_error_t SrsRtcVideoRecvTrack::on_rtp(SrsRtcStream* source, SrsRtpPacket2* pk
     }
 
     // For NACK to handle packet.
-    if ((err = on_nack(pkt)) != srs_success) {
+    if (nack_enabled && (err = on_nack(pkt)) != srs_success) {
         return srs_error_wrap(err, "on nack");
     }
 
diff --git a/trunk/src/app/srs_app_rtc_source.hpp b/trunk/src/app/srs_app_rtc_source.hpp
index 31125865b..6d2334083 100644
--- a/trunk/src/app/srs_app_rtc_source.hpp
+++ b/trunk/src/app/srs_app_rtc_source.hpp
@@ -526,7 +526,7 @@ public:
 protected:
     srs_error_t on_nack(SrsRtpPacket2* pkt);
 public:
-    virtual srs_error_t on_rtp(SrsRtcStream* source, SrsRtpPacket2* pkt) = 0;
+    virtual srs_error_t on_rtp(SrsRtcStream* source, SrsRtpPacket2* pkt, bool nack_enabled) = 0;
     virtual srs_error_t check_send_nacks() = 0;
 protected:
     virtual srs_error_t do_check_send_nacks(uint32_t& timeout_nacks);
@@ -540,7 +540,7 @@ public:
 public:
     virtual void on_before_decode_payload(SrsRtpPacket2* pkt, SrsBuffer* buf, ISrsRtpPayloader** ppayload);
 public:
-    virtual srs_error_t on_rtp(SrsRtcStream* source, SrsRtpPacket2* pkt);
+    virtual srs_error_t on_rtp(SrsRtcStream* source, SrsRtpPacket2* pkt, bool nack_enabled);
     virtual srs_error_t check_send_nacks();
 };
 
@@ -552,7 +552,7 @@ public:
 public:
     virtual void on_before_decode_payload(SrsRtpPacket2* pkt, SrsBuffer* buf, ISrsRtpPayloader** ppayload);
 public:
-    virtual srs_error_t on_rtp(SrsRtcStream* source, SrsRtpPacket2* pkt);
+    virtual srs_error_t on_rtp(SrsRtcStream* source, SrsRtpPacket2* pkt, bool nack_enabled);
     virtual srs_error_t check_send_nacks();
 };