diff --git a/Manuals/Docbook/Repository/Usage/chapter.docbook b/Manuals/Docbook/Repository/Usage/chapter.docbook
index 12ba1f7..2eae5aa 100644
--- a/Manuals/Docbook/Repository/Usage/chapter.docbook
+++ b/Manuals/Docbook/Repository/Usage/chapter.docbook
@@ -1,6 +1,5 @@
 <?xml version="1.0"?>
-
-<chapter>
+<chapter id="repository-usage-chapter">
 
     <title>Usage convenctions</title>