diff --git a/lisp/help-fns.el b/lisp/help-fns.el
index 07b4c406f0c..170f497541a 100644
--- a/lisp/help-fns.el
+++ b/lisp/help-fns.el
@@ -40,7 +40,7 @@
 (defvar help-fns-describe-function-functions nil
   "List of functions to run in help buffer in `describe-function'.
 Those functions will be run after the header line and argument
-list was inserted, and before the documentation is be inserted.
+list was inserted, and before the documentation is inserted.
 The functions will be called with one argument: the function's symbol.
 They can assume that a newline was output just before they were called,
 and they should terminate any of their own output with a newline.