diff --git a/lisp/vc/diff-mode.el b/lisp/vc/diff-mode.el
index f366261ae05..322074106f9 100644
--- a/lisp/vc/diff-mode.el
+++ b/lisp/vc/diff-mode.el
@@ -27,8 +27,8 @@
 ;; to the corresponding source file.
 
 ;; Inspired by Pavel Machek's patch-mode.el (<pavel@@atrey.karlin.mff.cuni.cz>)
-;; Some efforts were spent to have it somewhat compatible with XEmacs's
-;; diff-mode as well as with compilation-minor-mode
+;; Some efforts were spent to have it somewhat compatible with
+;; `compilation-minor-mode'.
 
 ;; Bugs: