diff --git a/media/engine/webrtc_voice_engine.cc b/media/engine/webrtc_voice_engine.cc
index 590c31e409..749f2506a5 100644
--- a/media/engine/webrtc_voice_engine.cc
+++ b/media/engine/webrtc_voice_engine.cc
@@ -722,6 +722,11 @@ std::vector<AudioCodec> WebRtcVoiceEngine::CollectCodecs(
       }
 
       out.push_back(codec);
+
+      if (codec.name == kOpusCodecName &&
+          IsAudioRedForOpusFieldTrialEnabled()) {
+        map_format({kRedCodecName, 48000, 2}, &out);
+      }
     }
   }
 
@@ -732,11 +737,6 @@ std::vector<AudioCodec> WebRtcVoiceEngine::CollectCodecs(
     }
   }
 
-  // Add red codec.
-  if (IsAudioRedForOpusFieldTrialEnabled()) {
-    map_format({kRedCodecName, 48000, 2}, &out);
-  }
-
   // Add telephone-event codecs last.
   for (const auto& dtmf : generate_dtmf) {
     if (dtmf.second) {