diff --git a/public/attributes b/public/attributes
index 50001e1eec79d2079376a8046fa7c28e05a89a14..fed8def39cfc07a7b53e84669786b7fda80551f5 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;