diff --git a/libs/gui/LayerState.cpp b/libs/gui/LayerState.cpp
index ec0573a..acd9ac5 100644
--- a/libs/gui/LayerState.cpp
+++ b/libs/gui/LayerState.cpp
@@ -677,6 +677,10 @@
     return NO_ERROR;
 }
 
+ReleaseCallbackId BufferData::generateReleaseCallbackId() const {
+    return {buffer->getId(), frameNumber};
+}
+
 status_t BufferData::write(Parcel& output) const {
     SAFE_PARCEL(output.writeInt32, flags.get());