diff --git a/core/java/android/hardware/display/DisplayManagerGlobal.java b/core/java/android/hardware/display/DisplayManagerGlobal.java
index 1fec3c9f..a18f1fb 100644
--- a/core/java/android/hardware/display/DisplayManagerGlobal.java
+++ b/core/java/android/hardware/display/DisplayManagerGlobal.java
@@ -941,7 +941,7 @@
 
     private static final class DisplayListenerDelegate extends Handler {
         public final DisplayListener mListener;
-        public long mEventsMask;
+        public volatile long mEventsMask;
 
         private final DisplayInfo mDisplayInfo = new DisplayInfo();
 
@@ -961,12 +961,12 @@
             removeCallbacksAndMessages(null);
         }
 
-        public synchronized void setEventsMask(@EventsMask long newEventsMask) {
+        public void setEventsMask(@EventsMask long newEventsMask) {
             mEventsMask = newEventsMask;
         }
 
         @Override
-        public synchronized void handleMessage(Message msg) {
+        public void handleMessage(Message msg) {
             switch (msg.what) {
                 case EVENT_DISPLAY_ADDED:
                     if ((mEventsMask & DisplayManager.EVENT_FLAG_DISPLAY_ADDED) != 0) {