diff --git a/framework-t/api/module-lib-current.txt b/framework-t/api/module-lib-current.txt
index 59ca730..aaaa628 100644
--- a/framework-t/api/module-lib-current.txt
+++ b/framework-t/api/module-lib-current.txt
@@ -90,7 +90,7 @@
     method @NonNull public android.net.NetworkStatsCollection build();
   }
 
-  public static class NetworkStatsCollection.Key {
+  public static final class NetworkStatsCollection.Key {
     ctor public NetworkStatsCollection.Key(@NonNull java.util.Set<android.net.NetworkIdentity>, int, int, int);
   }