diff --git a/conf/core/usersources.ini.template b/conf/core/usersources.ini.template
index 2e0fe2490a65b53022d8d0edff6495f3b92ec10a..fb3285723f0721da3280e5ef33461ff4b684e89f 100644
--- a/conf/core/usersources.ini.template
+++ b/conf/core/usersources.ini.template
@@ -42,7 +42,8 @@ defaultRealm = PAM
 # Options for authentication against Linux' PAM.
 [PAM]
 class = org.caosdb.server.accessControl.Pam
-# The script which does the actual checking.
+# The script which does the actual checking. It is possible to put custom
+# scripts or the misc/pam_authentication/ldap_authentication.sh script here.
 ; pam_script = ./misc/pam_authentication/pam_authentication.sh
 default_status = ACTIVE
 # Only users which fulfill these criteria are accepted.