diff --git a/services/core/java/com/android/server/am/ActivityManagerService.java b/services/core/java/com/android/server/am/ActivityManagerService.java
index 24d74b1a0e12b..72c876e7ed613 100644
--- a/services/core/java/com/android/server/am/ActivityManagerService.java
+++ b/services/core/java/com/android/server/am/ActivityManagerService.java
@@ -2928,9 +2928,11 @@ public final class ActivityManagerService extends ActivityManagerNative
 
     @Override
     public void batterySendBroadcast(Intent intent) {
-        broadcastIntentLocked(null, null, intent, null, null, 0, null, null, null,
-                AppOpsManager.OP_NONE, null, false, false,
-                -1, Process.SYSTEM_UID, UserHandle.USER_ALL);
+        synchronized (this) {
+            broadcastIntentLocked(null, null, intent, null, null, 0, null, null, null,
+                    AppOpsManager.OP_NONE, null, false, false,
+                    -1, Process.SYSTEM_UID, UserHandle.USER_ALL);
+        }
     }
 
     /**