diff --git a/lisp/info-look.el b/lisp/info-look.el
index 89eb1d7e411..8242932c3af 100644
--- a/lisp/info-look.el
+++ b/lisp/info-look.el
@@ -1,7 +1,7 @@
 ;;; info-look.el --- major-mode-sensitive Info index lookup facility
 ;; An older version of this was known as libc.el.
 
-;; Copyright (C) 1995,96,97,98,99,2001,2003  Free Software Foundation, Inc.
+;; Copyright (C) 1995,96,97,98,99,2001,2003,2004  Free Software Foundation, Inc.
 
 ;; Author: Ralph Schleicher <rs@nunatak.allgaeu.org>
 ;;         (did not show signs of life (Nov 2001)  -stef)
@@ -808,7 +808,7 @@ Return nil if there is nothing appropriate in the buffer near point."
 
 (info-lookup-maybe-add-help
  :mode 'scheme-mode
- :regexp "[^()'\" \t\n]+"
+ :regexp "[^()`',\" \t\n]+"
  :ignore-case t
  ;; Aubrey Jaffer's rendition from <URL:ftp://ftp-swiss.ai.mit.edu/pub/scm>
  :doc-spec '(("(r5rs)Index" nil