(defvar query-replace-history nil)
-(defvar query-replace-interactive nil
+(defcustom query-replace-interactive nil
"Non-nil means `query-replace' uses the last search string.
-That becomes the \"string to replace\".")
+That becomes the \"string to replace\"."
+ :type 'boolean
+ :group 'matching)
(defcustom query-replace-from-history-variable 'query-replace-history
"History list to use for the FROM argument of `query-replace' commands.