1 files changed, 3 insertions, 1 deletions

diff --git a/lisp/ediff-diff.el b/lisp/ediff-diff.el
index e3675064010..d2dff294d2e 100644
--- a/lisp/ediff-diff.el
+++ b/lisp/ediff-diff.el
@@ -1450,7 +1450,9 @@ arguments to `skip-chars-forward'."
       (condition-case nil
           (let ((res
                  (apply 'call-process ediff-cmp-program nil nil nil
-                        (append ediff-cmp-options (list f1 f2)))))
+                        (append ediff-cmp-options (list (expand-file-name f1)
+                                                        (expand-file-name f2))))
+                 ))
             (and (numberp res) (eq res 0)))
         (error (format "Cannot execute program %S." ediff-cmp-program)))
     ))