diff --git a/documentation/ref-manual/structure.rst b/documentation/ref-manual/structure.rst
index ff84b250b..596c19de5 100644
--- a/documentation/ref-manual/structure.rst
+++ b/documentation/ref-manual/structure.rst
@@ -370,7 +370,7 @@ Once the build process gets the sample file, it uses ``sed`` to substitute final
 .. _structure-build-conf-site.conf:

 ``build/conf/site.conf``
-========================
+------------------------

 This configuration file contains the site specific configurations for your build
 environment.