diff --git a/services/surfaceflinger/SurfaceFlinger.h b/services/surfaceflinger/SurfaceFlinger.h
index 3c92d56..0c60137 100644
--- a/services/surfaceflinger/SurfaceFlinger.h
+++ b/services/surfaceflinger/SurfaceFlinger.h
@@ -699,6 +699,7 @@
     bool latchBuffers();
 
     void updateLayerGeometry();
+    void updateLayerMetadataSnapshot();
 
     void updateInputFlinger();
     void persistDisplayBrightness(bool needsComposite) REQUIRES(kMainThreadContext);
@@ -1176,6 +1177,9 @@
     bool mSomeDataspaceChanged = false;
     bool mForceTransactionDisplayChange = false;
 
+    // Set if LayerMetadata has changed since the last LayerMetadata snapshot.
+    bool mLayerMetadataSnapshotNeeded = false;
+
     // Tracks layers that have pending frames which are candidates for being
     // latched.
     std::unordered_set<sp<Layer>, SpHash<Layer>> mLayersWithQueuedFrames;