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-rw-r--r--lisp/help-fns.el1
1 files changed, 1 insertions, 0 deletions
diff --git a/lisp/help-fns.el b/lisp/help-fns.el
index 3c0a72e2634..d6b4e763bbc 100644
--- a/lisp/help-fns.el
+++ b/lisp/help-fns.el
@@ -35,6 +35,7 @@
(require 'cl-lib)
(require 'help-mode)
(require 'radix-tree)
+(eval-when-compile (require 'subr-x)) ;For when-let.
(defvar help-fns-describe-function-functions nil
"List of functions to run in help buffer in `describe-function'.