diff --git a/lib/auth.rb b/lib/auth.rb
index 5f85ab982..edcb8b019 100644
--- a/lib/auth.rb
+++ b/lib/auth.rb
@@ -48,7 +48,7 @@ returns
       # auth ok
       if user_auth
 
-        Rails.logger.info "Authentication against #{config_item[:adapter]} for user #{user.login} ok."
+        Rails.logger.info "Authentication against #{config_item[:adapter]} for user #{user_auth.login} ok."
 
         # remember last login date
         user_auth.update_last_login