diff --git a/dom/media/platforms/agnostic/AgnosticDecoderModule.cpp b/dom/media/platforms/agnostic/AgnosticDecoderModule.cpp
index b38659abcdd1..ce275337107a 100644
--- a/dom/media/platforms/agnostic/AgnosticDecoderModule.cpp
+++ b/dom/media/platforms/agnostic/AgnosticDecoderModule.cpp
@@ -59,9 +59,7 @@ AgnosticDecoderModule::CreateAudioDecoder(const AudioInfo& aConfig,
                             aAudioTaskQueue,
                             aCallback);
   } else if (WaveDataDecoder::IsWave(aConfig.mMimeType)) {
-    m = new WaveDataDecoder(*aConfig.GetAsAudioInfo(),
-                            aAudioTaskQueue,
-                            aCallback);
+    m = new WaveDataDecoder(*aConfig.GetAsAudioInfo(), aCallback);
   }
 
   return m.forget();
diff --git a/dom/media/platforms/agnostic/WAVDecoder.cpp b/dom/media/platforms/agnostic/WAVDecoder.cpp
index c4f127690ae9..855dda39d1ae 100644
--- a/dom/media/platforms/agnostic/WAVDecoder.cpp
+++ b/dom/media/platforms/agnostic/WAVDecoder.cpp
@@ -47,12 +47,9 @@ DecodeULawSample(uint8_t aValue)
 }
 
 WaveDataDecoder::WaveDataDecoder(const AudioInfo& aConfig,
-                                 TaskQueue* aTaskQueue,
                                  MediaDataDecoderCallback* aCallback)
   : mInfo(aConfig)
-  , mTaskQueue(aTaskQueue)
   , mCallback(aCallback)
-  , mIsFlushing(false)
 {
 }
 
diff --git a/dom/media/platforms/agnostic/WAVDecoder.h b/dom/media/platforms/agnostic/WAVDecoder.h
index 0eb29706dfcc..6e1b2d044bc1 100644
--- a/dom/media/platforms/agnostic/WAVDecoder.h
+++ b/dom/media/platforms/agnostic/WAVDecoder.h
@@ -16,7 +16,6 @@ class WaveDataDecoder : public MediaDataDecoder
 {
 public:
   WaveDataDecoder(const AudioInfo& aConfig,
-                  TaskQueue* aTaskQueue,
                   MediaDataDecoderCallback* aCallback);
 
   // Return true if mimetype is Wave
@@ -36,9 +35,7 @@ private:
   bool DoDecode(MediaRawData* aSample);
 
   const AudioInfo& mInfo;
-  const RefPtr<TaskQueue> mTaskQueue;
   MediaDataDecoderCallback* mCallback;
-  Atomic<bool> mIsFlushing;
 };
 
 } // namespace mozilla