diff --git a/include/gui/BufferItem.h b/include/gui/BufferItem.h
index 504ac64..370f5d5 100644
--- a/include/gui/BufferItem.h
+++ b/include/gui/BufferItem.h
@@ -118,6 +118,13 @@
     // Describes the portion of the surface that has been modified since the
     // previous frame
     Region mSurfaceDamage;
+
+    // Indicates that the BufferQueue is in single buffer mode
+    bool mSingleBufferMode;
+
+    // Indicates that this buffer was queued by the producer. When in single
+    // buffer mode acquire() can return a BufferItem that wasn't in the queue.
+    bool mQueuedBuffer;
 };
 
 } // namespace android