diff --git a/doc/reference/cally/cally-docs.xml.in b/doc/reference/cally/cally-docs.xml.in
index 503ccc333..65f6a878e 100644
--- a/doc/reference/cally/cally-docs.xml.in
+++ b/doc/reference/cally/cally-docs.xml.in
@@ -108,11 +108,6 @@
     <xi:include href="xml/api-index-1.6.xml"><xi:fallback /></xi:include>
   </index>
 
-  <index role="1.6">
-    <title>Index of new symbols in 1.8</title>
-    <xi:include href="xml/api-index-1.8.xml"><xi:fallback /></xi:include>
-  </index>
-
   <appendix id="license">
     <title>License</title>