diff --git a/xdoc/xdocs/reference/xdocs.xml b/xdoc/xdocs/reference/xdocs.xml
index 48a8a3c8..9541d0b3 100644
--- a/xdoc/xdocs/reference/xdocs.xml
+++ b/xdoc/xdocs/reference/xdocs.xml
@@ -179,7 +179,7 @@
you should include the following DOCTYPE
declaration just after the <xml> element: