diff --git a/services/core/java/com/android/server/pm/UserManagerService.java b/services/core/java/com/android/server/pm/UserManagerService.java
index 264170c..0607525 100644
--- a/services/core/java/com/android/server/pm/UserManagerService.java
+++ b/services/core/java/com/android/server/pm/UserManagerService.java
@@ -403,9 +403,10 @@
         return ui;
     }
 
+    /** Called by PackageManagerService */
     public boolean exists(int userId) {
         synchronized (mPackagesLock) {
-            return ArrayUtils.contains(mUserIds, userId);
+            return mUsers.get(userId) != null;
         }
     }