diff --git a/services/surfaceflinger/BufferLayer.h b/services/surfaceflinger/BufferLayer.h
index cd3d80e..760c8b9 100644
--- a/services/surfaceflinger/BufferLayer.h
+++ b/services/surfaceflinger/BufferLayer.h
@@ -133,6 +133,7 @@
         bool mTransformToDisplayInverse{false};
 
         std::shared_ptr<renderengine::ExternalTexture> mBuffer;
+        uint64_t mFrameNumber;
         int mBufferSlot{BufferQueue::INVALID_BUFFER_SLOT};
 
         bool mFrameLatencyNeeded{false};