(footnote-section-tag): Use defcustom.

diff --git a/lisp/mail/footnote.el b/lisp/mail/footnote.el
index 4644d36ad25193287231ea6383b906d03a076ccd..b5ec6f02260ec452351b4ef566d9a7e0d142d0d0 100644 (file)
--- a/lisp/mail/footnote.el
+++ b/lisp/mail/footnote.el
@@ -87,8 +87,11 @@ If nil, no blank line will be inserted."
 
 ;;; Interface variables that probably shouldn't be changed
 
-(defconst footnote-section-tag "Footnotes: "
-  "*Tag inserted at beginning of footnote section.")
+(defcustom footnote-section-tag "Footnotes: "
+  "*Tag inserted at beginning of footnote section."
+  :version "21.4"
+  :type 'string
+  :group 'footnote)
 
 (defcustom footnote-section-tag-regexp "Footnotes\\(\\[.\\]\\)?: "
   "*Regexp which indicates the start of a footnote section.