diff --git a/services/core/java/com/android/server/webkit/WebViewUpdater.java b/services/core/java/com/android/server/webkit/WebViewUpdater.java
index 37479c8..203bbf6 100644
--- a/services/core/java/com/android/server/webkit/WebViewUpdater.java
+++ b/services/core/java/com/android/server/webkit/WebViewUpdater.java
@@ -68,7 +68,7 @@
     // The WebView package currently in use (or the one we are preparing).
     private PackageInfo mCurrentWebViewPackage = null;
 
-    private Object mLock = new Object();
+    private final Object mLock = new Object();
 
     WebViewUpdater(Context context, SystemInterface systemInterface) {
         mContext = context;