diff --git a/private/attributes b/private/attributes
index e01b212..3d18d71 100644
--- a/private/attributes
+++ b/private/attributes
@@ -1 +1,6 @@
 hal_attribute(lazy_test);
+
+# This is applied to apps on vendor images with SDK <=30 only,
+# to exempt them from recent mls changes. It must not be applied
+# to any domain on newer system or vendor image.
+attribute mlsvendorcompat;