diff --git a/webrtc/modules/audio_coding/neteq4/interface/neteq.h b/webrtc/modules/audio_coding/neteq4/interface/neteq.h
index 1f1ee67928..7c39cb1f4c 100644
--- a/webrtc/modules/audio_coding/neteq4/interface/neteq.h
+++ b/webrtc/modules/audio_coding/neteq4/interface/neteq.h
@@ -65,6 +65,12 @@ enum NetEqPlayoutMode {
   kPlayoutStreaming
 };
 
+enum NetEqBackgroundNoiseMode {
+  kBgnOn,
+  kBgnFade,
+  kBgnOff
+};
+
 // This is the interface class for NetEq.
 class NetEq {
  public:
@@ -237,6 +243,14 @@ class NetEq {
   // This method is to facilitate NACK.
   virtual int DecodedRtpInfo(int* sequence_number, uint32_t* timestamp) = 0;
 
+  // Not implemented.
+  virtual int InsertSyncPacket(const WebRtcRTPHeader& rtp_header,
+                               uint32_t receive_timestamp) = 0;
+
+  virtual void SetBackgroundNoiseMode(NetEqBackgroundNoiseMode mode) = 0;
+
+  virtual NetEqBackgroundNoiseMode BackgroundNoiseMode() const = 0;
+
  protected:
   NetEq() {}
 
diff --git a/webrtc/modules/audio_coding/neteq4/neteq_impl.cc b/webrtc/modules/audio_coding/neteq4/neteq_impl.cc
index 64addf8732..ee2aedce62 100644
--- a/webrtc/modules/audio_coding/neteq4/neteq_impl.cc
+++ b/webrtc/modules/audio_coding/neteq4/neteq_impl.cc
@@ -374,6 +374,17 @@ int NetEqImpl::DecodedRtpInfo(int* sequence_number, uint32_t* timestamp) {
   return 0;
 }
 
+int NetEqImpl::InsertSyncPacket(const WebRtcRTPHeader& /* rtp_header */,
+                                uint32_t /* receive_timestamp */) {
+  return kNotImplemented;
+}
+
+void NetEqImpl::SetBackgroundNoiseMode(NetEqBackgroundNoiseMode /* mode */) {}
+
+NetEqBackgroundNoiseMode NetEqImpl::BackgroundNoiseMode() const {
+  return kBgnOn;
+}
+
 // Methods below this line are private.
 
 
diff --git a/webrtc/modules/audio_coding/neteq4/neteq_impl.h b/webrtc/modules/audio_coding/neteq4/neteq_impl.h
index b000961d72..9bdafdde3d 100644
--- a/webrtc/modules/audio_coding/neteq4/neteq_impl.h
+++ b/webrtc/modules/audio_coding/neteq4/neteq_impl.h
@@ -171,6 +171,13 @@ class NetEqImpl : public webrtc::NetEq {
   // This method is to facilitate NACK.
   virtual int DecodedRtpInfo(int* sequence_number, uint32_t* timestamp);
 
+  virtual int InsertSyncPacket(const WebRtcRTPHeader& rtp_header,
+                                 uint32_t receive_timestamp);
+
+  virtual void SetBackgroundNoiseMode(NetEqBackgroundNoiseMode mode);
+
+  virtual NetEqBackgroundNoiseMode BackgroundNoiseMode() const;
+
  private:
   static const int kOutputSizeMs = 10;
   static const int kMaxFrameSize = 2880;  // 60 ms @ 48 kHz.