diff --git a/comint-ledger.el b/comint-ledger.el
index 75cc9ab..f817d8c 100644
--- a/comint-ledger.el
+++ b/comint-ledger.el
@@ -19,40 +19,40 @@
 
 (require 'comint)
 
-(defvar ledger-cli-path (executable-find "ledger")
+(defvar comint-ledger-cli-path (executable-find "ledger")
   "Path to the program used by `run-ledger'.")
 
-(defvar ledger-file-path nil
+(defvar comint-ledger-file-path nil
   "Path to the ledger data file.")
 
-(defvar ledger-cli-arguments '()
+(defvar comint-ledger-cli-arguments '()
   "Commandline arguments to pass to `ledger'.")
 
-(defvar ledger-mode-map
+(defvar comint-ledger-mode-map
   (let ((map (nconc (make-sparse-keymap) comint-mode-map)))
     ;; example definition
     (define-key map "\t" 'completion-at-point)
     map)
   "Basic mode map for `run-ledger'.")
 
-(defvar ledger-prompt-regexp (rx bol "] ")
+(defvar comint-ledger-prompt-regexp (rx bol "] ")
   "Prompt for `run-ledger'.")
 
-(defvar ledger-buffer-name "*Ledger*"
+(defvar comint-ledger-buffer-name "*Ledger*"
   "Name of the buffer to use for the `run-ledger' comint instance.")
 
 ;;;###autoload
 (defun run-ledger (ledger-file)
   "Run an inferior instance of `ledger' inside Emacs, using LEDGER-FILE.
 
-The LEDGER-FILE can be configured through the `ledger-file-path'
+The LEDGER-FILE can be configured through the `comint-ledger-file-path'
 variable, otherwise a prompt will appear to select a file."
-  (interactive (list (or ledger-file-path
+  (interactive (list (or comint-ledger-file-path
                          (read-file-name "Ledger file: "))))
-  (let* ((ledger-program ledger-cli-path)
+  (let* ((ledger-program comint-ledger-cli-path)
          (ledger-file-arguments (list "--no-pager" "-f" ledger-file))
-         (ledger-arguments (append ledger-file-arguments ledger-cli-arguments))
-         (buffer (get-buffer-create ledger-buffer-name))
+         (ledger-arguments (append ledger-file-arguments comint-ledger-cli-arguments))
+         (buffer (get-buffer-create comint-ledger-buffer-name))
          (proc-alive (comint-check-proc buffer)))
     ;; if the process is dead then re-create the process and reset the
     ;; mode.
@@ -65,7 +65,7 @@ variable, otherwise a prompt will appear to select a file."
     (when buffer
       (pop-to-buffer buffer))))
 
-(defun ledger--initialize ()
+(defun comint-ledger--initialize ()
   "Helper function to initialize ledger."
   (setq comint-process-echoes t)
   (setq comint-use-prompt-regexp t))
@@ -75,25 +75,25 @@ variable, otherwise a prompt will appear to select a file."
 
 \\<ledger-mode-map>"
   ;; this sets up the prompt so it matches things like: [foo@bar]
-  (setq comint-prompt-regexp ledger-prompt-regexp)
+  (setq comint-prompt-regexp comint-ledger-prompt-regexp)
   ;; this makes it read only; a contentious subject as some prefer the
   ;; buffer to be overwritable.
   (setq comint-prompt-read-only t)
   ;; this makes it so commands like M-{ and M-} work.
   (set (make-local-variable 'paragraph-separate) "\\'")
-  (set (make-local-variable 'font-lock-defaults) '(ledger-font-lock-keywords t))
-  (set (make-local-variable 'paragraph-start) ledger-prompt-regexp))
+  (set (make-local-variable 'font-lock-defaults) '(comint-ledger-font-lock-keywords t))
+  (set (make-local-variable 'paragraph-start) comint-ledger-prompt-regexp))
 
-(add-hook 'ledger-mode-hook 'ledger--initialize)
+(add-hook 'ledger-mode-hook 'comint-ledger--initialize)
 
-(defconst ledger-keywords
+(defconst comint-ledger-keywords
   '()
-  "List of keywords to highlight in `ledger-font-lock-keywords'.")
+  "List of keywords to highlight in `comint-ledger-font-lock-keywords'.")
 
-(defvar ledger-font-lock-keywords
+(defvar comint-ledger-font-lock-keywords
   (list
    ;; highlight all the reserved commands.
-   `(,(concat "\\_<" (regexp-opt ledger-keywords) "\\_>") . font-lock-keyword-face))
+   `(,(concat "\\_<" (regexp-opt comint-ledger-keywords) "\\_>") . font-lock-keyword-face))
   "Additional expressions to highlight in `comint-ledger-mode'.")
 
 (provide 'comint-ledger)