1diff --git a/misc/fuel/fuel-listener.el b/misc/fuel/fuel-listener.el
2index 2d1b182a75..bf2e573425 100644
3--- a/misc/fuel/fuel-listener.el
4+++ b/misc/fuel/fuel-listener.el
5@@ -30,13 +30,13 @@
6 "Interacting with a Factor listener inside Emacs."
7 :group 'fuel)
8
9-(defcustom fuel-factor-root-dir nil
10+(defcustom fuel-factor-root-dir "@fuel_factor_root_dir@"
11 "Full path to the factor root directory when starting a listener."
12 :type 'directory
13 :group 'fuel-listener)
14
15 ;;; Is factor.com still valid on Windows...?
16-(defcustom fuel-listener-factor-binary nil
17+(defcustom fuel-listener-factor-binary "@fuel_listener_factor_binary@"
18 "Full path to the factor executable to use when starting a listener."
19 :type '(file :must-match t)
20 :group 'fuel-listener)