* subr.el (add-hook): Robustify to handle closure as well.

1 files changed, 1 insertions, 1 deletions

diff --git a/lisp/subr.el b/lisp/subr.el
index f8b5d605f9..adf3f9a97f 100644
--- a/lisp/subr.el
+++ b/lisp/subr.el
@@ -1366,7 +1366,7 @@ function, it is changed to a list of functions."
       (setq local t)))
   (let ((hook-value (if local (symbol-value hook) (default-value hook))))
     ;; If the hook value is a single function, turn it into a list.
-    (when (or (not (listp hook-value)) (eq (car hook-value) 'lambda))
+    (when (or (not (listp hook-value)) (functionp hook-value))
       (setq hook-value (list hook-value)))
     ;; Do the actual addition if necessary
     (unless (member function hook-value)