diff --git a/talk/media/base/mediachannel.h b/talk/media/base/mediachannel.h
index f6fb77d8a6..c18847465c 100644
--- a/talk/media/base/mediachannel.h
+++ b/talk/media/base/mediachannel.h
@@ -441,16 +441,6 @@ inline const RtpHeaderExtension* FindHeaderExtension(
   return NULL;
 }
 
-enum MediaChannelOptions {
-  // Tune the stream for conference mode.
-  OPT_CONFERENCE = 0x0001
-};
-
-enum VoiceMediaChannelOptions {
-  // Tune the audio stream for vcs with different target levels.
-  OPT_AGC_MINUS_10DB = 0x80000000
-};
-
 class MediaChannel : public sigslot::has_slots<> {
  public:
   class NetworkInterface {
diff --git a/talk/media/webrtc/webrtcvideoengine2_unittest.cc b/talk/media/webrtc/webrtcvideoengine2_unittest.cc
index dfff00af66..4c357f16c6 100644
--- a/talk/media/webrtc/webrtcvideoengine2_unittest.cc
+++ b/talk/media/webrtc/webrtcvideoengine2_unittest.cc
@@ -3138,7 +3138,7 @@ TEST_F(WebRtcVideoEngine2SimulcastTest, DISABLED_NoSimulcastWith1on1) {
   FAIL() << "Not implemented.";
 }
 
-// Test SetOptions with OPT_CONFERENCE flag.
+// Test SetOptions with conference mode.
 TEST_F(WebRtcVideoEngine2SimulcastTest, DISABLED_SetOptionsWithConferenceMode) {
   // TODO(pbos): Implement.
   FAIL() << "Not implemented.";