diff --git a/inventory/group_vars/all b/inventory/group_vars/all
index 37122606da..82a73adfd5 100644
--- a/inventory/group_vars/all
+++ b/inventory/group_vars/all
@@ -77,6 +77,7 @@ nfs_mount_opts: "ro,hard,bg,intr,noatime,nodev,nosuid"
 # ssh controlpersist to work. 
 sudo: false
 
+root_auth_users: ''
 
 # This vars get shoved into /etc/system_identification by the base role.
 # Groups and individual hosts should override them with specific info.