diff --git a/libs/gui/BLASTBufferQueue.cpp b/libs/gui/BLASTBufferQueue.cpp
index 39dd5d9..ae61ea8 100644
--- a/libs/gui/BLASTBufferQueue.cpp
+++ b/libs/gui/BLASTBufferQueue.cpp
@@ -982,4 +982,9 @@
     }
 }
 
+uint64_t BLASTBufferQueue::getLastAcquiredFrameNum() {
+    std::unique_lock _lock{mMutex};
+    return mLastAcquiredFrameNumber;
+}
+
 } // namespace android