diff --git a/services/surfaceflinger/BufferQueueLayer.h b/services/surfaceflinger/BufferQueueLayer.h
index 9374741..36dff15 100644
--- a/services/surfaceflinger/BufferQueueLayer.h
+++ b/services/surfaceflinger/BufferQueueLayer.h
@@ -31,6 +31,7 @@
  */
 class BufferQueueLayer : public BufferLayer, public BufferLayerConsumer::ContentsChangedListener {
 public:
+    // Only call while mStateLock is held
     explicit BufferQueueLayer(const LayerCreationArgs&);
     ~BufferQueueLayer() override;
 
@@ -81,6 +82,7 @@
     status_t updateFrameNumber(nsecs_t latchTime) override;
 
     void latchPerFrameState(compositionengine::LayerFECompositionState&) const override;
+    sp<Layer> createClone() override;
 
     // -----------------------------------------------------------------------
     // Interface implementation for BufferLayerConsumer::ContentsChangedListener