diff --git a/roles/jupyterhub/README.md b/roles/jupyterhub/README.md
index 8fe58f77e..68ec85ad9 100644
--- a/roles/jupyterhub/README.md
+++ b/roles/jupyterhub/README.md
@@ -33,7 +33,7 @@ source /opt/iiab/jupyterhub/bin/activate
 Passwords are hashed using 4096 rounds of the latest Blowfish (bcrypt's $2b$ algorithm) and stored in:
 
 ```
-/opt/iiab/jupyterhub/etc/passwords.dbm.db
+/opt/iiab/jupyterhub/etc/passwords.dbm    # Or passwords.dbm.db in the past.
 ```
 
 ### Users can change their own password