-(defconst bug-reference-bug-regexp
- "\\([Bb]ug ?#\\|[Pp]atch ?#\\|RFE ?#\\|PR [a-z-+]+/\\)\\([0-9]+\\)"
- "Regular expression which matches bug references.")
+(defcustom bug-reference-bug-regexp
+ "\\([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
+ :safe 'stringp
+ :version "24.3" ; previously defconst
+ :group 'bug-reference)