diff --git a/emacs/notmuch-wash.el b/emacs/notmuch-wash.el
index d613e04c..653ecc2a 100644
--- a/emacs/notmuch-wash.el
+++ b/emacs/notmuch-wash.el
@@ -24,6 +24,7 @@
 ;;; Code:
 
 (require 'coolj)
+(require 'diff-mode)
 (require 'notmuch-lib)
 
 (declare-function notmuch-show-insert-bodypart "notmuch-show"
@@ -341,10 +342,6 @@ the wrapped text are maintained."
 
 ;;;; Convert Inline Patches
 
-(require 'diff-mode)
-
-(defvar diff-file-header-re) ; From `diff-mode.el'.
-
 (defun notmuch-wash-subject-to-filename (subject &optional maxlen)
   "Convert a mail SUBJECT into a filename.