diff --git a/include/gui/GLConsumer.h b/include/gui/GLConsumer.h
index 00f38b4..75ee30c 100644
--- a/include/gui/GLConsumer.h
+++ b/include/gui/GLConsumer.h
@@ -141,6 +141,13 @@
     // documented by the source.
     int64_t getTimestamp();
 
+    // getFrameNumber retrieves the frame number associated with the texture
+    // image set by the most recent call to updateTexImage.
+    //
+    // The frame number is an incrementing counter set to 0 at the creation of
+    // the BufferQueue associated with this consumer.
+    int64_t getFrameNumber();
+
     // setDefaultBufferSize is used to set the size of buffers returned by
     // requestBuffers when a with and height of zero is requested.
     // A call to setDefaultBufferSize() may trigger requestBuffers() to
@@ -337,6 +344,10 @@
     // gets set each time updateTexImage is called.
     int64_t mCurrentTimestamp;
 
+    // mCurrentFrameNumber is the frame counter for the current texture.
+    // It gets set each time updateTexImage is called.
+    int64_t mCurrentFrameNumber;
+
     uint32_t mDefaultWidth, mDefaultHeight;
 
     // mFilteringEnabled indicates whether the transform matrix is computed for