diff --git a/doc/manual_installation/opendkim.rst b/doc/manual_installation/opendkim.rst
index abafe7a9b..dc7748350 100644
--- a/doc/manual_installation/opendkim.rst
+++ b/doc/manual_installation/opendkim.rst
@@ -30,8 +30,8 @@ PostgreSQL
      FROM admin_domain WHERE enable_dkim
    );
 
- MySQL/MariaDB
- -------------
+MySQL/MariaDB
+-------------
 
 ::