diff --git a/misc/fuel/fuel-listener.el b/misc/fuel/fuel-listener.el
index d7fbfb2e74..2c3e46695d 100644
--- a/misc/fuel/fuel-listener.el
+++ b/misc/fuel/fuel-listener.el
@@ -147,6 +147,10 @@ buffer."
 
 ;;; Fuel listener mode:
 
+(defun fuel-listener--bol ()
+  (interactive)
+  (when (= (point) (comint-bol)) (beginning-of-line)))
+
 ;;;###autoload
 (define-derived-mode fuel-listener-mode comint-mode "Fuel Listener"
   "Major mode for interacting with an inferior Factor listener process.
@@ -160,6 +164,7 @@ buffer."
 
 (define-key fuel-listener-mode-map "\C-cz" 'run-factor)
 (define-key fuel-listener-mode-map "\C-c\C-z" 'run-factor)
+(define-key fuel-listener-mode-map "\C-a" 'fuel-listener--bol)
 (define-key fuel-listener-mode-map "\C-ca" 'fuel-autodoc-mode)
 (define-key fuel-listener-mode-map "\C-ch" 'fuel-help)
 (define-key fuel-listener-mode-map "\C-cs" 'fuel-stack-mode)
diff --git a/misc/fuel/fuel-syntax.el b/misc/fuel/fuel-syntax.el
index 794381cb47..f5e9cb31d2 100644
--- a/misc/fuel/fuel-syntax.el
+++ b/misc/fuel/fuel-syntax.el
@@ -123,6 +123,12 @@
   (format "\\(%s\\)\\|\\(%s .*\\)"
           fuel-syntax--end-of-def-line-regex
           fuel-syntax--single-liner-regex))
+
+(defconst fuel-syntax--defun-signature-regex
+  (format "\\(%s\\|%s\\)"
+          (format ":[^ ]* [^ ]+\\(%s\\)*" fuel-syntax--stack-effect-regex)
+          "M[^:]*: [^ ]+ [^ ]+"))
+
 
 ;;; Factor syntax table
 
@@ -261,11 +267,6 @@
     (re-search-forward fuel-syntax--end-of-def-regex nil t)
     (point)))
 
-(defconst fuel-syntax--defun-signature-regex
-  (format "\\(%s\\|%s\\)"
-          (format ":[^ ]* [^ ]+\\(%s\\)*" fuel-syntax--stack-effect-regex)
-          "M[^:]*: [^ ]+ [^ ]+"))
-
 (defun fuel-syntax--beginning-of-body ()
   (let ((p (point)))
     (and (fuel-syntax--beginning-of-defun)