diff --git a/libs/surfaceflinger/SurfaceFlinger.h b/libs/surfaceflinger/SurfaceFlinger.h
index 56ea97a..69e2f2e 100644
--- a/libs/surfaceflinger/SurfaceFlinger.h
+++ b/libs/surfaceflinger/SurfaceFlinger.h
@@ -348,6 +348,10 @@
                 // don't use a lock for these, we don't care
                 int                         mDebugRegion;
                 int                         mDebugBackground;
+                volatile nsecs_t            mDebugInSwapBuffers;
+                nsecs_t                     mLastSwapBufferTime;
+                volatile nsecs_t            mDebugInTransaction;
+                nsecs_t                     mLastTransactionTime;
 
                 // these are thread safe
     mutable     Barrier                     mReadyToRunBarrier;