--- a/dom/media/MediaInfo.h
+++ b/dom/media/MediaInfo.h
@@ -376,18 +376,17 @@ public:
     , mExtraData(aOther.mExtraData)
   {
   }
 
   static const uint32_t MAX_RATE = 640000;
 
   bool IsValid() const override
   {
-    return mChannels > 0 && mChannels <= MAX_AUDIO_CHANNELS &&
-           mRate > 0 && mRate <= MAX_RATE;
+    return mChannels > 0 && mRate > 0 && mRate <= MAX_RATE;
   }
 
   AudioInfo* GetAsAudioInfo() override
   {
     return this;
   }
 
   const AudioInfo* GetAsAudioInfo() const override