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-rw-r--r--lisp/diff-mode.el2
1 files changed, 1 insertions, 1 deletions
diff --git a/lisp/diff-mode.el b/lisp/diff-mode.el
index 0090a61d0ab..4913ef72e35 100644
--- a/lisp/diff-mode.el
+++ b/lisp/diff-mode.el
@@ -1717,7 +1717,7 @@ For use in `add-log-current-defun-function'."
(let ((old (if switched dst src)))
(with-temp-buffer
(insert (car old))
- (funcall (with-current-buffer buf major-mode))
+ (funcall (buffer-local-value 'major-mode buf))
(goto-char (+ (point-min) (cdr old)))
(add-log-current-defun))))
(with-current-buffer buf