diff --git a/docs/harfbuzz-docs.xml b/docs/harfbuzz-docs.xml
index e3f314d..7a175f3 100644
--- a/docs/harfbuzz-docs.xml
+++ b/docs/harfbuzz-docs.xml
@@ -43,6 +43,7 @@
       <xi:include href="usermanual-opentype-features.xml"/>
       <xi:include href="usermanual-clusters.xml"/>
       <xi:include href="usermanual-utilities.xml"/>
+      <xi:include href="usermanual-integration.xml"/>
   </part>
 
   <part>