diff --git a/docs/reference/gdk/gdk-docs.sgml b/docs/reference/gdk/gdk-docs.sgml
index a5107dc65d..2ecddbaba7 100644
--- a/docs/reference/gdk/gdk-docs.sgml
+++ b/docs/reference/gdk/gdk-docs.sgml
@@ -76,6 +76,10 @@
     <title>Index of new symbols in 3.8</title>
     <xi:include href="xml/api-index-3.8.xml"><xi:fallback /></xi:include>
   </index>
+  <index id="api-index-3-10" role="3.10">
+    <title>Index of new symbols in 3.10</title>
+    <xi:include href="xml/api-index-3.10.xml"><xi:fallback /></xi:include>
+  </index>
 
   <xi:include href="xml/annotation-glossary.xml"><xi:fallback /></xi:include>