diff --git a/services/surfaceflinger/SurfaceFlinger.h b/services/surfaceflinger/SurfaceFlinger.h
index 38db62b..ccaeb2d 100644
--- a/services/surfaceflinger/SurfaceFlinger.h
+++ b/services/surfaceflinger/SurfaceFlinger.h
@@ -535,6 +535,13 @@
     void repaintEverythingForHWC() override;
     // Called when kernel idle timer has expired. Used to update the refresh rate overlay.
     void kernelTimerChanged(bool expired) override;
+    // Toggles the kernel idle timer on or off depending the policy decisions around refresh rates.
+    void toggleKernelIdleTimer();
+    // Keeps track of whether the kernel idle timer is currently enabled, so we don't have to
+    // make calls to sys prop each time.
+    bool mKernelIdleTimerEnabled = false;
+    // Keeps track of whether the kernel timer is supported on the SF side.
+    bool mSupportKernelIdleTimer = false;
     /* ------------------------------------------------------------------------
      * Message handling
      */