diff --git a/services/surfaceflinger/SurfaceFlinger.h b/services/surfaceflinger/SurfaceFlinger.h
index 1615ab6..d1eae1c 100644
--- a/services/surfaceflinger/SurfaceFlinger.h
+++ b/services/surfaceflinger/SurfaceFlinger.h
@@ -906,7 +906,7 @@
     /*
      * Display management
      */
-    DisplayModes loadSupportedDisplayModes(PhysicalDisplayId) const;
+    DisplayModes loadSupportedDisplayModes(PhysicalDisplayId) const REQUIRES(mStateLock);
     sp<DisplayDevice> setupNewDisplayDeviceInternal(
             const wp<IBinder>& displayToken,
             std::shared_ptr<compositionengine::Display> compositionDisplay,