diff --git a/media/engine/webrtc_voice_engine.cc b/media/engine/webrtc_voice_engine.cc
index 016c00fbcc..590c31e409 100644
--- a/media/engine/webrtc_voice_engine.cc
+++ b/media/engine/webrtc_voice_engine.cc
@@ -1719,6 +1719,7 @@ bool WebRtcVoiceMediaChannel::SetSendCodecs(
       send_codec_spec;
   webrtc::BitrateConstraints bitrate_config;
   absl::optional<webrtc::AudioCodecInfo> voice_codec_info;
+  size_t send_codec_position = 0;
   for (const AudioCodec& voice_codec : codecs) {
     if (!(IsCodec(voice_codec, kCnCodecName) ||
           IsCodec(voice_codec, kDtmfCodecName) ||
@@ -1742,6 +1743,7 @@ bool WebRtcVoiceMediaChannel::SetSendCodecs(
       bitrate_config = GetBitrateConfigForCodec(voice_codec);
       break;
     }
+    send_codec_position++;
   }
 
   if (!send_codec_spec) {
@@ -1783,13 +1785,16 @@ bool WebRtcVoiceMediaChannel::SetSendCodecs(
   if (IsAudioRedForOpusFieldTrialEnabled()) {
     // Loop through the codecs to find the RED codec that matches opus
     // with respect to clockrate and number of channels.
+    size_t red_codec_position = 0;
     for (const AudioCodec& red_codec : codecs) {
-      if (IsCodec(red_codec, kRedCodecName) &&
+      if (red_codec_position < send_codec_position &&
+          IsCodec(red_codec, kRedCodecName) &&
           red_codec.clockrate == send_codec_spec->format.clockrate_hz &&
           red_codec.channels == send_codec_spec->format.num_channels) {
         send_codec_spec->red_payload_type = red_codec.id;
         break;
       }
+      red_codec_position++;
     }
   }
 
diff --git a/media/engine/webrtc_voice_engine_unittest.cc b/media/engine/webrtc_voice_engine_unittest.cc
index d70019e9f3..1bd631f14d 100644
--- a/media/engine/webrtc_voice_engine_unittest.cc
+++ b/media/engine/webrtc_voice_engine_unittest.cc
@@ -1507,33 +1507,35 @@ TEST_P(WebRtcVoiceEngineTestFake, SetSendCodecs) {
   EXPECT_FALSE(channel_->CanInsertDtmf());
 }
 
-// Test that we set Opus/Red under the field trial.
+// Test that we use Opus/Red under the field trial when it is
+// listed as the first codec.
 TEST_P(WebRtcVoiceEngineTestFake, SetSendCodecsRed) {
   webrtc::test::ScopedFieldTrials override_field_trials(
       "WebRTC-Audio-Red-For-Opus/Enabled/");
 
+  EXPECT_TRUE(SetupSendStream());
+  cricket::AudioSendParameters parameters;
+  parameters.codecs.push_back(kRed48000Codec);
+  parameters.codecs.push_back(kOpusCodec);
+  SetSendParameters(parameters);
+  const auto& send_codec_spec = *GetSendStreamConfig(kSsrcX).send_codec_spec;
+  EXPECT_EQ(111, send_codec_spec.payload_type);
+  EXPECT_STRCASEEQ("opus", send_codec_spec.format.name.c_str());
+  EXPECT_EQ(112, send_codec_spec.red_payload_type);
+}
+
+// Test that we do not use Opus/Red under the field trial by default.
+TEST_P(WebRtcVoiceEngineTestFake, SetSendCodecsRedDefault) {
+  webrtc::test::ScopedFieldTrials override_field_trials(
+      "WebRTC-Audio-Red-For-Opus/Enabled/");
+
   EXPECT_TRUE(SetupSendStream());
   cricket::AudioSendParameters parameters;
   parameters.codecs.push_back(kOpusCodec);
   parameters.codecs.push_back(kRed48000Codec);
-  parameters.codecs[0].id = 96;
   SetSendParameters(parameters);
   const auto& send_codec_spec = *GetSendStreamConfig(kSsrcX).send_codec_spec;
-  EXPECT_EQ(96, send_codec_spec.payload_type);
-  EXPECT_STRCASEEQ("opus", send_codec_spec.format.name.c_str());
-  EXPECT_EQ(112, send_codec_spec.red_payload_type);
-}
-
-// Test that we set do not interpret Opus/Red by default.
-TEST_P(WebRtcVoiceEngineTestFake, SetSendCodecsRedDefault) {
-  EXPECT_TRUE(SetupSendStream());
-  cricket::AudioSendParameters parameters;
-  parameters.codecs.push_back(kOpusCodec);
-  parameters.codecs.push_back(kRed48000Codec);
-  parameters.codecs[0].id = 96;
-  SetSendParameters(parameters);
-  const auto& send_codec_spec = *GetSendStreamConfig(kSsrcX).send_codec_spec;
-  EXPECT_EQ(96, send_codec_spec.payload_type);
+  EXPECT_EQ(111, send_codec_spec.payload_type);
   EXPECT_STRCASEEQ("opus", send_codec_spec.format.name.c_str());
   EXPECT_EQ(absl::nullopt, send_codec_spec.red_payload_type);
 }