diff --git a/doc/user_guide/en/wsjtx-main.adoc b/doc/user_guide/en/wsjtx-main.adoc
index 3684c1fc4..fb05c9145 100644
--- a/doc/user_guide/en/wsjtx-main.adoc
+++ b/doc/user_guide/en/wsjtx-main.adoc
@@ -232,3 +232,7 @@ include::acknowledgements.adoc[]
 == License
 include::../../common/license.adoc[]
 
+ifeval::["{backend}" != "html5"]
+[index]
+== Index
+endif::[]