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-rw-r--r--generic/proof-toolbar.el1
1 files changed, 1 insertions, 0 deletions
diff --git a/generic/proof-toolbar.el b/generic/proof-toolbar.el
index de867fc5..1303bd4b 100644
--- a/generic/proof-toolbar.el
+++ b/generic/proof-toolbar.el
@@ -214,6 +214,7 @@ without giving error messages."
(defun proof-toolbar-undo ()
"Undo last successful in locked region, without deleting it."
+ (interactive)
(if (proof-toolbar-undo-enable-p)
(save-excursion
(proof-undo-last-successful-command t))))