diff --git a/doc/build/templates/genindex.mako b/doc/build/templates/genindex.mako
index 0a25b67..2f45f79 100644
--- a/doc/build/templates/genindex.mako
+++ b/doc/build/templates/genindex.mako
@@ -21,7 +21,7 @@
         numcols = 1
         numitems = 0
     %>
-% for entryname, (links, subitems) in entries:
+% for entryname, (links, subitems, dummy) in entries:
 
 <dt>
     % if links: