diff --git a/services/surfaceflinger/SurfaceFlinger.h b/services/surfaceflinger/SurfaceFlinger.h
index e1b52c5..d6d31cb 100644
--- a/services/surfaceflinger/SurfaceFlinger.h
+++ b/services/surfaceflinger/SurfaceFlinger.h
@@ -1357,6 +1357,13 @@
     float getLayerFramerate(nsecs_t now, int32_t id) const {
         return mScheduler->getLayerFramerate(now, id);
     }
+
+    struct {
+        bool sessionEnabled = false;
+        nsecs_t commitStart;
+        nsecs_t compositeStart;
+        nsecs_t presentEnd;
+    } mPowerHintSessionData GUARDED_BY(SF_MAIN_THREAD);
 };
 
 } // namespace android