diff --git a/doc/misc/cl.texi b/doc/misc/cl.texi
index 8baa0bd88c6..338d3345ff9 100644
--- a/doc/misc/cl.texi
+++ b/doc/misc/cl.texi
@@ -1728,6 +1728,7 @@ iterating over vectors or lists.
 
 @node Loop Facility
 @section Loop Facility
+@cindex loop facility
 
 @noindent
 A common complaint with Lisp's traditional looping constructs was