diff --git a/services/core/java/com/android/server/am/PreBootBroadcaster.java b/services/core/java/com/android/server/am/PreBootBroadcaster.java
index 376999dfd80d5..beb0e4741c360 100644
--- a/services/core/java/com/android/server/am/PreBootBroadcaster.java
+++ b/services/core/java/com/android/server/am/PreBootBroadcaster.java
@@ -107,9 +107,11 @@ public abstract class PreBootBroadcaster extends IIntentReceiver.Stub {
         EventLogTags.writeAmPreBoot(mUserId, componentName.getPackageName());
 
         mIntent.setComponent(componentName);
-        mService.broadcastIntentLocked(null, null, mIntent, null, this, 0, null, null, null,
-                AppOpsManager.OP_NONE, null, true, false, ActivityManagerService.MY_PID,
-                Process.SYSTEM_UID, Binder.getCallingUid(), Binder.getCallingPid(), mUserId);
+        synchronized (mService) {
+            mService.broadcastIntentLocked(null, null, mIntent, null, this, 0, null, null, null,
+                    AppOpsManager.OP_NONE, null, true, false, ActivityManagerService.MY_PID,
+                    Process.SYSTEM_UID, Binder.getCallingUid(), Binder.getCallingPid(), mUserId);
+        }
     }
 
     @Override