diff --git a/talk/app/webrtc/mediaconstraintsinterface.cc b/talk/app/webrtc/mediaconstraintsinterface.cc
index 6f88d793a..0ecadd691 100644
--- a/talk/app/webrtc/mediaconstraintsinterface.cc
+++ b/talk/app/webrtc/mediaconstraintsinterface.cc
@@ -119,6 +119,7 @@ const char MediaConstraintsInterface::kHighBitrate[] =
 const char MediaConstraintsInterface::kVeryHighBitrate[] =
     "googVeryHighBitrate";
 const char MediaConstraintsInterface::kPayloadPadding[] = "googPayloadPadding";
+const char MediaConstraintsInterface::kOpusFec[] = "googOpusFec";
 
 
 // Set |value| to the value associated with the first appearance of |key|, or
diff --git a/talk/app/webrtc/mediaconstraintsinterface.h b/talk/app/webrtc/mediaconstraintsinterface.h
index 0db39a667..36257db71 100644
--- a/talk/app/webrtc/mediaconstraintsinterface.h
+++ b/talk/app/webrtc/mediaconstraintsinterface.h
@@ -134,6 +134,11 @@ class MediaConstraintsInterface {
   static const char kVeryHighBitrate[];  // googVeryHighBitrate
   static const char kPayloadPadding[];  // googPayloadPadding
 
+  // PeerConnection codec constraint keys. This should be combined with the
+  // values above.
+  // kOpusFec controls whether we ask the other side to turn on FEC for Opus.
+  static const char kOpusFec[];  // googOpusFec
+
   // The prefix of internal-only constraints whose JS set values should be
   // stripped by Chrome before passed down to Libjingle.
   static const char kInternalConstraintPrefix[];
diff --git a/talk/app/webrtc/webrtcsession.cc b/talk/app/webrtc/webrtcsession.cc
index 3ba1943de..1b1c28781 100644
--- a/talk/app/webrtc/webrtcsession.cc
+++ b/talk/app/webrtc/webrtcsession.cc
@@ -615,6 +615,10 @@ bool WebRtcSession::Initialize(
         cricket::VideoOptions::HIGH);
   }
 
+  SetOptionFromOptionalConstraint(constraints,
+      MediaConstraintsInterface::kOpusFec,
+      &audio_options_.opus_fec);
+
   const cricket::VideoCodec default_codec(
       JsepSessionDescription::kDefaultVideoCodecId,
       JsepSessionDescription::kDefaultVideoCodecName,
diff --git a/talk/media/base/mediachannel.h b/talk/media/base/mediachannel.h
index 2d65daf59..34d2deff7 100644
--- a/talk/media/base/mediachannel.h
+++ b/talk/media/base/mediachannel.h
@@ -182,6 +182,7 @@ struct AudioOptions {
     recording_sample_rate.SetFrom(change.recording_sample_rate);
     playout_sample_rate.SetFrom(change.playout_sample_rate);
     dscp.SetFrom(change.dscp);
+    opus_fec.SetFrom(change.opus_fec);
   }
 
   bool operator==(const AudioOptions& o) const {
@@ -207,7 +208,8 @@ struct AudioOptions {
         rx_agc_limiter == o.rx_agc_limiter &&
         recording_sample_rate == o.recording_sample_rate &&
         playout_sample_rate == o.playout_sample_rate &&
-        dscp == o.dscp;
+        dscp == o.dscp &&
+        opus_fec == o.opus_fec;
   }
 
   std::string ToString() const {
@@ -238,6 +240,7 @@ struct AudioOptions {
     ost << ToStringIfSet("recording_sample_rate", recording_sample_rate);
     ost << ToStringIfSet("playout_sample_rate", playout_sample_rate);
     ost << ToStringIfSet("dscp", dscp);
+    ost << ToStringIfSet("opus_fec", opus_fec);
     ost << "}";
     return ost.str();
   }
@@ -275,6 +278,8 @@ struct AudioOptions {
   Settable<uint32> playout_sample_rate;
   // Set DSCP value for packet sent from audio channel.
   Settable<bool> dscp;
+  // Set Opus FEC
+  Settable<bool> opus_fec;
 };
 
 // Options that can be applied to a VideoMediaChannel or a VideoMediaEngine.
diff --git a/talk/media/webrtc/webrtcvoiceengine.cc b/talk/media/webrtc/webrtcvoiceengine.cc
index 785cdf11c..f1460a6cb 100644
--- a/talk/media/webrtc/webrtcvoiceengine.cc
+++ b/talk/media/webrtc/webrtcvoiceengine.cc
@@ -237,6 +237,7 @@ static AudioOptions GetDefaultEngineOptions() {
   options.experimental_aec.Set(false);
   options.experimental_ns.Set(false);
   options.aec_dump.Set(false);
+  options.opus_fec.Set(false);
   return options;
 }
 
@@ -399,12 +400,8 @@ static bool IsIsac(const AudioCodec& codec) {
 
 // True if params["stereo"] == "1"
 static bool IsOpusStereoEnabled(const AudioCodec& codec) {
-  CodecParameterMap::const_iterator param =
-      codec.params.find(kCodecParamStereo);
-  if (param == codec.params.end()) {
-    return false;
-  }
-  return param->second == kParamValueTrue;
+  int value;
+  return codec.GetParam(kCodecParamStereo, &value) && value == 1;
 }
 
 static bool IsValidOpusBitrate(int bitrate) {
@@ -426,14 +423,20 @@ static int GetOpusBitrateFromParams(const AudioCodec& codec) {
   return bitrate;
 }
 
-// True if params["useinbandfec"] == "1"
+// Return true params[kCodecParamUseInbandFec] == kParamValueTrue, false
+// otherwise.
 static bool IsOpusFecEnabled(const AudioCodec& codec) {
-  CodecParameterMap::const_iterator param =
-      codec.params.find(kCodecParamUseInbandFec);
-  if (param == codec.params.end())
-    return false;
+  int value;
+  return codec.GetParam(kCodecParamUseInbandFec, &value) && value == 1;
+}
 
-  return param->second == kParamValueTrue;
+// Set params[kCodecParamUseInbandFec]. Caller should make sure codec is Opus.
+static void SetOpusFec(AudioCodec *codec, bool opus_fec) {
+  if (opus_fec) {
+    codec->params[kCodecParamUseInbandFec] = kParamValueTrue;
+  } else {
+    codec->params.erase(kCodecParamUseInbandFec);
+  }
 }
 
 void WebRtcVoiceEngine::ConstructCodecs() {
@@ -480,6 +483,7 @@ void WebRtcVoiceEngine::ConstructCodecs() {
           }
           // TODO(hellner): Add ptime, sprop-stereo, stereo and useinbandfec
           // when they can be set to values other than the default.
+          SetOpusFec(&codec, false);
         }
         codecs_.push_back(codec);
       } else {
@@ -905,6 +909,16 @@ bool WebRtcVoiceEngine::ApplyOptions(const AudioOptions& options_in) {
     }
   }
 
+  bool opus_fec = false;
+  if (options.opus_fec.Get(&opus_fec)) {
+    LOG(LS_INFO) << "Opus FEC is enabled? " << opus_fec;
+    for (std::vector<AudioCodec>::iterator it = codecs_.begin();
+        it != codecs_.end(); ++it) {
+      if (IsOpus(*it))
+        SetOpusFec(&(*it), opus_fec);
+    }
+  }
+
   return true;
 }
 
@@ -2022,7 +2036,7 @@ bool WebRtcVoiceMediaChannel::SetSendCodecs(
         voe_codec.rate = bitrate_from_params;
       }
 
-      // If FEC is enabled.
+      // For Opus, we also enable inband FEC if it is requested.
       if (IsOpusFecEnabled(*it)) {
         LOG(LS_INFO) << "Enabling Opus FEC on channel " << channel;
 #ifdef USE_WEBRTC_DEV_BRANCH
diff --git a/talk/media/webrtc/webrtcvoiceengine_unittest.cc b/talk/media/webrtc/webrtcvoiceengine_unittest.cc
index 80a50c555..58893b98a 100644
--- a/talk/media/webrtc/webrtcvoiceengine_unittest.cc
+++ b/talk/media/webrtc/webrtcvoiceengine_unittest.cc
@@ -1146,7 +1146,7 @@ TEST_F(WebRtcVoiceEngineTestFake, AddRecvStreamEnableNack) {
 
 #ifdef USE_WEBRTC_DEV_BRANCH
 // Test that without useinbandfec, Opus FEC is off.
-TEST_F(WebRtcVoiceEngineTestFake, SetSendCodecNoOpusFEC) {
+TEST_F(WebRtcVoiceEngineTestFake, SetSendCodecNoOpusFec) {
   EXPECT_TRUE(SetupEngine());
   int channel_num = voe_.GetLastChannel();
   std::vector<cricket::AudioCodec> codecs;
@@ -1157,7 +1157,7 @@ TEST_F(WebRtcVoiceEngineTestFake, SetSendCodecNoOpusFEC) {
 }
 
 // Test that with useinbandfec=0, Opus FEC is off.
-TEST_F(WebRtcVoiceEngineTestFake, SetSendCodecOpusDisableFEC) {
+TEST_F(WebRtcVoiceEngineTestFake, SetSendCodecOpusDisableFec) {
   EXPECT_TRUE(SetupEngine());
   int channel_num = voe_.GetLastChannel();
   std::vector<cricket::AudioCodec> codecs;
@@ -1174,7 +1174,7 @@ TEST_F(WebRtcVoiceEngineTestFake, SetSendCodecOpusDisableFEC) {
 }
 
 // Test that with useinbandfec=1, Opus FEC is on.
-TEST_F(WebRtcVoiceEngineTestFake, SetSendCodecOpusEnableFEC) {
+TEST_F(WebRtcVoiceEngineTestFake, SetSendCodecOpusEnableFec) {
   EXPECT_TRUE(SetupEngine());
   int channel_num = voe_.GetLastChannel();
   std::vector<cricket::AudioCodec> codecs;
@@ -1191,7 +1191,7 @@ TEST_F(WebRtcVoiceEngineTestFake, SetSendCodecOpusEnableFEC) {
 }
 
 // Test that with useinbandfec=1, stereo=1, Opus FEC is on.
-TEST_F(WebRtcVoiceEngineTestFake, SetSendCodecOpusEnableFECStereo) {
+TEST_F(WebRtcVoiceEngineTestFake, SetSendCodecOpusEnableFecStereo) {
   EXPECT_TRUE(SetupEngine());
   int channel_num = voe_.GetLastChannel();
   std::vector<cricket::AudioCodec> codecs;
@@ -1209,7 +1209,7 @@ TEST_F(WebRtcVoiceEngineTestFake, SetSendCodecOpusEnableFECStereo) {
 }
 
 // Test that with non-Opus, codec FEC is off.
-TEST_F(WebRtcVoiceEngineTestFake, SetSendCodecIsacNoFEC) {
+TEST_F(WebRtcVoiceEngineTestFake, SetSendCodecIsacNoFec) {
   EXPECT_TRUE(SetupEngine());
   int channel_num = voe_.GetLastChannel();
   std::vector<cricket::AudioCodec> codecs;
@@ -1219,6 +1219,31 @@ TEST_F(WebRtcVoiceEngineTestFake, SetSendCodecIsacNoFEC) {
 }
 #endif  // USE_WEBRTC_DEV_BRANCH
 
+// Test AudioOptions controls whether opus FEC is supported in codec list.
+TEST_F(WebRtcVoiceEngineTestFake, OpusFecViaOptions) {
+  EXPECT_TRUE(SetupEngine());
+  std::vector<cricket::AudioCodec> codecs = engine_.codecs();
+  int value;
+  for (std::vector<cricket::AudioCodec>::const_iterator it = codecs.begin();
+      it != codecs.end(); ++it) {
+    if (_stricmp(it->name.c_str(), cricket::kOpusCodecName) == 0) {
+      EXPECT_FALSE(it->GetParam(cricket::kCodecParamUseInbandFec, &value));
+    }
+  }
+
+  cricket::AudioOptions options;
+  options.opus_fec.Set(true);
+  EXPECT_TRUE(engine_.SetOptions(options));
+  codecs = engine_.codecs();
+  for (std::vector<cricket::AudioCodec>::const_iterator it = codecs.begin();
+      it != codecs.end(); ++it) {
+    if (_stricmp(it->name.c_str(), cricket::kOpusCodecName) == 0) {
+      EXPECT_TRUE(it->GetParam(cricket::kCodecParamUseInbandFec, &value));
+      EXPECT_EQ(1, value);
+    }
+  }
+}
+
 // Test that we can apply CELT with stereo mode but fail with mono mode.
 TEST_F(WebRtcVoiceEngineTestFake, SetSendCodecsCelt) {
   EXPECT_TRUE(SetupEngine());