diff --git a/install/windows/index.xml b/install/windows/index.xml
index aff7b9a8dc..fb769ea870 100644
--- a/install/windows/index.xml
+++ b/install/windows/index.xml
@@ -79,7 +79,7 @@
 
     <para>Some extensions use features specific to some Unix systems and so are not available on Windows. Otherwise, all extensions are available for Windows.
     </para>
-</sect1>
+  </sect1>
 
   <!-- Critical: ensure all pages in install/windows and that install/windows/legacy/index are referenced here!
   otherwise you will get IDREF attribute errors for all links -->