diff --git a/webrtc/p2p/base/dtlstransportchannel.h b/webrtc/p2p/base/dtlstransportchannel.h
index 68bf4c00d2..2090759aad 100644
--- a/webrtc/p2p/base/dtlstransportchannel.h
+++ b/webrtc/p2p/base/dtlstransportchannel.h
@@ -199,7 +199,7 @@ class DtlsTransportChannelWrapper : public TransportChannelImpl {
     channel_->OnCandidate(candidate);
   }
 
-  void SetReceivingTimeout(int receiving_timeout_ms) {
+  void SetReceivingTimeout(int receiving_timeout_ms) override {
     channel_->SetReceivingTimeout(receiving_timeout_ms);
   }
 
diff --git a/webrtc/p2p/base/transportchannelproxy.h b/webrtc/p2p/base/transportchannelproxy.h
index 3d55d10694..e39398abe8 100644
--- a/webrtc/p2p/base/transportchannelproxy.h
+++ b/webrtc/p2p/base/transportchannelproxy.h
@@ -79,7 +79,7 @@ class TransportChannelProxy : public TransportChannel,
   void OnReadyToSend(TransportChannel* channel);
   void OnRouteChange(TransportChannel* channel, const Candidate& candidate);
 
-  void OnMessage(rtc::Message* message);
+  void OnMessage(rtc::Message* message) override;
 
   typedef std::pair<rtc::Socket::Option, int> OptionPair;
   typedef std::vector<OptionPair> OptionList;