1 files changed, 13 insertions, 12 deletions

diff --git a/lisp/wid-edit.el b/lisp/wid-edit.el
index 1d6de477221..b2beb229b3b 100644
--- a/lisp/wid-edit.el
+++ b/lisp/wid-edit.el
@@ -1276,18 +1276,19 @@ Unlike (get-char-property POS 'field) this, works with empty fields too."
 (defun widget-before-change (from to)
   ;; This is how, for example, a variable changes its state to `modified'.
   ;; when it is being edited.
-  (let ((from-field (widget-field-find from))
-        (to-field (widget-field-find to)))
-    (cond ((not (eq from-field to-field))
-           (add-hook 'post-command-hook 'widget-add-change nil t)
-           (error "Change should be restricted to a single field"))
-          ((null from-field)
-           (add-hook 'post-command-hook 'widget-add-change nil t)
-           (error "Attempt to change text outside editable field"))
-          (widget-field-use-before-change
-           (condition-case nil
-               (widget-apply from-field :notify from-field)
-             (error (debug "Before Change")))))))
+  (unless inhibit-read-only
+    (let ((from-field (widget-field-find from))
+          (to-field (widget-field-find to)))
+      (cond ((not (eq from-field to-field))
+             (add-hook 'post-command-hook 'widget-add-change nil t)
+             (error "Change should be restricted to a single field"))
+            ((null from-field)
+             (add-hook 'post-command-hook 'widget-add-change nil t)
+             (error "Attempt to change text outside editable field"))
+            (widget-field-use-before-change
+             (condition-case nil
+                 (widget-apply from-field :notify from-field)
+               (error (debug "Before Change"))))))))
 
 (defun widget-add-change ()
   (make-local-hook 'post-command-hook)