diff --git a/documentation/dev-manual/dev-manual.xml b/documentation/dev-manual/dev-manual.xml
index 577cfbf14a..89910e832e 100644
--- a/documentation/dev-manual/dev-manual.xml
+++ b/documentation/dev-manual/dev-manual.xml
@@ -58,6 +58,8 @@
 
     <xi:include href="dev-manual-cases.xml"/>
 
+    <xi:include href="dev-manual-model.xml"/>
+
 <!--    <index id='index'>
       <title>Index</title>
     </index>