diff --git a/doc/public/cairo-docs.xml b/doc/public/cairo-docs.xml
index 4e72237a2..7e441316d 100644
--- a/doc/public/cairo-docs.xml
+++ b/doc/public/cairo-docs.xml
@@ -62,5 +62,8 @@
   <index id="index-1.6" role="1.6">
     <title>Index of new symbols in 1.6</title>
   </index>
+  <index id="index-1.8" role="1.8">
+    <title>Index of new symbols in 1.8</title>
+  </index>
   <xi:include href="language-bindings.xml"/>
 </book>