--- a/content/media/ogg/OggCodecState.h
+++ b/content/media/ogg/OggCodecState.h
@@ -64,17 +64,16 @@ class OggPacketQueue : private nsDeque {
 public:
   OggPacketQueue() : nsDeque(new OggPacketDeallocator()) {}
   ~OggPacketQueue() { Erase(); }
   bool IsEmpty() { return nsDeque::GetSize() == 0; }
   void Append(ogg_packet* aPacket);
   ogg_packet* PopFront() { return static_cast<ogg_packet*>(nsDeque::PopFront()); }
   ogg_packet* PeekFront() { return static_cast<ogg_packet*>(nsDeque::PeekFront()); }
   void PushFront(ogg_packet* aPacket) { nsDeque::PushFront(aPacket); }
-  void PushBack(ogg_packet* aPacket) { nsDeque::Push(aPacket); }
   void Erase() { nsDeque::Erase(); }
 };
 
 // Encapsulates the data required for decoding an ogg bitstream and for
 // converting granulepos to timestamps.
 class OggCodecState {
 public:
   typedef mozilla::MetadataTags MetadataTags;