1 files changed, 3 insertions, 1 deletions

diff --git a/lisp/emacs-lisp/lisp-mode.el b/lisp/emacs-lisp/lisp-mode.el
index 9879b9f5fae..541cbe6f445 100644
--- a/lisp/emacs-lisp/lisp-mode.el
+++ b/lisp/emacs-lisp/lisp-mode.el
@@ -119,7 +119,9 @@
   (make-local-variable 'comment-start)
   (setq comment-start ";")
   (make-local-variable 'comment-start-skip)
-  (setq comment-start-skip ";+ *")
+  ;; Look within the line for a ; following an even number of backslashes
+  ;; after either a non-backslash or the line beginning.
+  (setq comment-start-skip "\\(\\(^\\|[^\\\\\n]\\)\\(\\\\\\\\\\)*\\);+ *")
   (make-local-variable 'comment-column)
   (setq comment-column 40)
   (make-local-variable 'comment-indent-function)