diff --git a/admin_manual/configuration/configuration_database.rst b/admin_manual/configuration/configuration_database.rst
index 6c556df81..54568c1ac 100644
--- a/admin_manual/configuration/configuration_database.rst
+++ b/admin_manual/configuration/configuration_database.rst
@@ -66,7 +66,7 @@ The PHP configuration in :file:`/etc/php5/conf.d/mysql.ini` could look like this
   mysql.max_persistent=-1
   mysql.max_links=-1
   mysql.default_port=
-  mysql.default_socket=/var/lib/mysql/mysql.sock
+  mysql.default_socket=/var/lib/mysql/mysql.sock  # debian squeeze: /var/run/mysqld/mysqld.sock
   mysql.default_host=
   mysql.default_user=
   mysql.default_password=