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-rw-r--r--lisp/vc/vc-sccs.el2
1 files changed, 1 insertions, 1 deletions
diff --git a/lisp/vc/vc-sccs.el b/lisp/vc/vc-sccs.el
index cd4c054b07d..8a9e0b11289 100644
--- a/lisp/vc/vc-sccs.el
+++ b/lisp/vc/vc-sccs.el
@@ -342,7 +342,7 @@ Remaining arguments are ignored."
(defvar w32-quote-process-args)
;; FIXME use sccsdiff if present?
-(defun vc-sccs-diff (files &optional oldvers newvers buffer)
+(defun vc-sccs-diff (files &optional _async oldvers newvers buffer)
"Get a difference report using SCCS between two filesets."
(setq files (vc-expand-dirs files))
(setq oldvers (vc-sccs-lookup-triple (car files) oldvers))