diff --git a/idem-fedops/HOWTO-Shibboleth/Identity Provider/Debian-Ubuntu/HOWTO-Install-and-Configure-a-Shibboleth-IdP-v5.x-on-Debian-Ubuntu-Linux-with-Apache-+-Jetty.md b/idem-fedops/HOWTO-Shibboleth/Identity Provider/Debian-Ubuntu/HOWTO-Install-and-Configure-a-Shibboleth-IdP-v5.x-on-Debian-Ubuntu-Linux-with-Apache-+-Jetty.md
index 823dc69b..9e9d66a3 100644
--- a/idem-fedops/HOWTO-Shibboleth/Identity Provider/Debian-Ubuntu/HOWTO-Install-and-Configure-a-Shibboleth-IdP-v5.x-on-Debian-Ubuntu-Linux-with-Apache-+-Jetty.md	
+++ b/idem-fedops/HOWTO-Shibboleth/Identity Provider/Debian-Ubuntu/HOWTO-Install-and-Configure-a-Shibboleth-IdP-v5.x-on-Debian-Ubuntu-Linux-with-Apache-+-Jetty.md	
@@ -1392,7 +1392,7 @@ By default, a transient NameID will always be released to the Service Provider i
 
         The *sourceAttribute* MUST be an attribute, or a list of comma-separated attributes, that uniquely identify the subject of the generated `persistent-id`.
 
-        The *sourceAttribute* MUST be a **Stable**, **Permanent** and **Not-reassignable** directory attribute.
+        The *sourceAttribute* MUST be a **SAML attribute** populated using a **Stable**, **Permanent** and **Not-reassignable** directory attribute, not a directory attribute itself unless you create a SAML attribute with the same name.
 
         ``` xml+jinja
         # ... other things ...#