diff --git a/prebuilts/api/28.0/public/attributes b/prebuilts/api/28.0/public/attributes
index 6c55c417977499858e024200fccf9bc3d8490389..ea7229299fdc18a67c5e1463398783bf54201062 100644
--- a/prebuilts/api/28.0/public/attributes
+++ b/prebuilts/api/28.0/public/attributes
@@ -38,6 +38,7 @@ attribute vendor_file_type;
 
 # All types used for procfs files.
 attribute proc_type;
+expandattribute proc_type false;
 
 # All types used for sysfs files.
 attribute sysfs_type;
diff --git a/public/attributes b/public/attributes
index 6c55c417977499858e024200fccf9bc3d8490389..ea7229299fdc18a67c5e1463398783bf54201062 100644
--- a/public/attributes
+++ b/public/attributes
@@ -38,6 +38,7 @@ attribute vendor_file_type;
 
 # All types used for procfs files.
 attribute proc_type;
+expandattribute proc_type false;
 
 # All types used for sysfs files.
 attribute sysfs_type;