[docs] Hook up hb-var
diff --git a/docs/harfbuzz-docs.xml b/docs/harfbuzz-docs.xml
index 140184a..31aa405 100644
--- a/docs/harfbuzz-docs.xml
+++ b/docs/harfbuzz-docs.xml
@@ -76,6 +76,7 @@
         <xi:include href="xml/hb-ot-name.xml"/>
         <xi:include href="xml/hb-ot-math.xml"/>
         <xi:include href="xml/hb-ot-shape.xml"/>
+        <xi:include href="xml/hb-ot-var.xml"/>
 
         <xi:include href="xml/hb-shape-plan.xml"/>