1 files changed, 1 insertions, 1 deletions

diff --git a/lisp/progmodes/bug-reference.el b/lisp/progmodes/bug-reference.el
index a78c57c2053..921a904191c 100644
--- a/lisp/progmodes/bug-reference.el
+++ b/lisp/progmodes/bug-reference.el
@@ -69,7 +69,7 @@ so that it is considered safe, see `enable-local-variables'.")
                 (get s 'bug-reference-url-format)))))
 
 (defcustom bug-reference-bug-regexp
-  "\\([Bb]ug ?#\\|[Pp]atch ?#\\|RFE ?#\\|PR [a-z-+]+/\\)\\([0-9]+\\(?:#[0-9]+\\)?\\)"
+  "\\([Bb]ug ?#?\\|[Pp]atch ?#\\|RFE ?#\\|PR [a-z-+]+/\\)\\([0-9]+\\(?:#[0-9]+\\)?\\)"
   "Regular expression matching bug references.
 The second subexpression should match the bug reference (usually a number)."
   :type 'string