--- a/gfx/layers/ipc/LayerTransactionChild.h
+++ b/gfx/layers/ipc/LayerTransactionChild.h
@@ -14,21 +14,22 @@
 #include "mozilla/layers/AsyncTransactionTracker.h" // for AsyncTransactionTracker
 #include "mozilla/layers/PLayerTransactionChild.h"
 #include "mozilla/RefPtr.h"
 
 namespace mozilla {
 
 namespace layout {
 class RenderFrameChild;
-class ShadowLayerForwarder;
 } // namespace layout
 
 namespace layers {
 
+class ShadowLayerForwarder;
+
 class LayerTransactionChild : public PLayerTransactionChild
                             , public AsyncTransactionTrackersHolder
 {
   typedef InfallibleTArray<AsyncParentMessageData> AsyncParentMessageArray;
 public:
   NS_INLINE_DECL_THREADSAFE_REFCOUNTING(LayerTransactionChild)
   /**
    * Clean this up, finishing with SendShutDown() which will cause __delete__