diff --git a/core/prelude-core.el b/core/prelude-core.el
index f1a0cec..d828e3f 100644
--- a/core/prelude-core.el
+++ b/core/prelude-core.el
@@ -273,7 +273,8 @@ there's a region, all lines that region covers will be duplicated."
   "Cleanup a region if selected, otherwise the whole buffer."
   (interactive)
   (call-interactively 'untabify)
-  (call-interactively 'indent-region)
+  (unless (member major-mode prelude-indent-sensitive-modes)
+    (call-interactively 'indent-region))
   (whitespace-cleanup))
 
 (defun prelude-eval-and-replace ()
diff --git a/core/prelude-custom.el b/core/prelude-custom.el
index 335a1ea..23b4f47 100644
--- a/core/prelude-custom.el
+++ b/core/prelude-custom.el
@@ -76,6 +76,23 @@ in the desired elisp file."
   :type 'string
   :group 'prelude)
 
+(defcustom prelude-indent-sensitive-modes
+  '(coffee-mode python-mode slim-mode haml-mode)
+  "Modes for which auto-indenting is suppressed."
+  :type 'list
+  :group 'prelude)
+
+(defcustom prelude-yank-indent-modes '(LaTeX-mode TeX-mode)
+  "Modes in which to indent regions that are yanked (or yank-popped).
+Only modes that don't derive from `prog-mode' should be listed here."
+  :type 'list
+  :group 'prelude)
+
+(defcustom prelude-yank-indent-threshold 1000
+  "Threshold (# chars) over which indentation does not automatically occur."
+  :type 'number
+  :group 'prelude)
+
 (provide 'prelude-custom)
 
 ;;; prelude-custom.el ends here
diff --git a/core/prelude-editor.el b/core/prelude-editor.el
index 99c6dba..55970a5 100644
--- a/core/prelude-editor.el
+++ b/core/prelude-editor.el
@@ -297,40 +297,28 @@ The body of the advice is in BODY."
 (with-region-or-buffer untabify)
 
 ;; automatically indenting yanked text if in programming-modes
-(defvar yank-indent-modes
-  '(LaTeX-mode TeX-mode)
-  "Modes in which to indent regions that are yanked (or yank-popped).
-Only modes that don't derive from `prog-mode' should be listed here.")
-
-(defvar yank-indent-blacklisted-modes
-  '(python-mode slim-mode haml-mode)
-  "Modes for which auto-indenting is suppressed.")
-
-(defvar yank-advised-indent-threshold 1000
-  "Threshold (# chars) over which indentation does not automatically occur.")
-
 (defun yank-advised-indent-function (beg end)
   "Do indentation, as long as the region isn't too large."
-  (if (<= (- end beg) yank-advised-indent-threshold)
+  (if (<= (- end beg) prelude-yank-indent-threshold)
       (indent-region beg end nil)))
 
 (defadvice yank (after yank-indent activate)
-  "If current mode is one of 'yank-indent-modes,
+  "If current mode is one of 'prelude-yank-indent-modes,
 indent yanked text (with prefix arg don't indent)."
   (if (and (not (ad-get-arg 0))
-           (not (member major-mode yank-indent-blacklisted-modes))
+           (not (member major-mode prelude-indent-sensitive-modes))
            (or (derived-mode-p 'prog-mode)
-               (member major-mode yank-indent-modes)))
+               (member major-mode prelude-yank-indent-modes)))
       (let ((transient-mark-mode nil))
         (yank-advised-indent-function (region-beginning) (region-end)))))
 
 (defadvice yank-pop (after yank-pop-indent activate)
-  "If current mode is one of `yank-indent-modes',
+  "If current mode is one of `prelude-yank-indent-modes',
 indent yanked text (with prefix arg don't indent)."
   (when (and (not (ad-get-arg 0))
-             (not (member major-mode yank-indent-blacklisted-modes))
+             (not (member major-mode prelude-indent-sensitive-modes))
              (or (derived-mode-p 'prog-mode)
-                 (member major-mode yank-indent-modes)))
+                 (member major-mode prelude-yank-indent-modes)))
     (let ((transient-mark-mode nil))
       (yank-advised-indent-function (region-beginning) (region-end)))))