diff --git a/proto/src/metrics_constants.proto b/proto/src/metrics_constants.proto
index ffc3103..4cc1363 100644
--- a/proto/src/metrics_constants.proto
+++ b/proto/src/metrics_constants.proto
@@ -1903,5 +1903,9 @@
     // App requested access to a directory it has already been granted
     // access before; action pass package name of calling package.
     ACTION_SCOPED_DIRECTORY_ACCESS_ALREADY_GRANTED_BY_PACKAGE = 331;
+
+    // Add new aosp constants above this line.
+    // END OF AOSP CONSTANTS
+
   }
 }