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-rw-r--r--lisp/vc/vc-rcs.el2
1 files changed, 1 insertions, 1 deletions
diff --git a/lisp/vc/vc-rcs.el b/lisp/vc/vc-rcs.el
index 8866bdbad96..cb3d36f13fb 100644
--- a/lisp/vc/vc-rcs.el
+++ b/lisp/vc/vc-rcs.el
@@ -535,7 +535,7 @@ files beneath it."
(vc-rcs-print-log-cleanup))
(when limit 'limit-unsupported))
-(defun vc-rcs-diff (files &optional async oldvers newvers buffer)
+(defun vc-rcs-diff (files &optional oldvers newvers buffer async)
"Get a difference report using RCS between two sets of files."
(apply #'vc-do-command (or buffer "*vc-diff*")
(if async 'async 1)