--- a/dom/media/mediasource/SourceBufferTask.h
+++ b/dom/media/mediasource/SourceBufferTask.h
@@ -43,17 +43,17 @@ public:
 
 protected:
   virtual ~SourceBufferTask() {}
 };
 
 class AppendBufferTask : public SourceBufferTask {
 public:
   AppendBufferTask(MediaByteBuffer* aData,
-                   SourceBufferAttributes aAttributes)
+                   const SourceBufferAttributes& aAttributes)
   : mBuffer(aData)
   , mAttributes(aAttributes)
   {}
 
   static const Type sType = Type::AppendBuffer;
   Type GetType() const override { return Type::AppendBuffer; }
 
   RefPtr<MediaByteBuffer> mBuffer;
@@ -103,9 +103,9 @@ public:
 class DetachTask : public SourceBufferTask {
 public:
   static const Type sType = Type::Detach;
   Type GetType() const override { return Type::Detach; }
 };
 
 } // end mozilla namespace
 
-#endif
\ No newline at end of file
+#endif