diff --git a/init.el b/init.el
index a60b4ac..7aa67a6 100644
--- a/init.el
+++ b/init.el
@@ -637,7 +637,8 @@
              db/convert-lf-to-crlf-in-buffer
              db/convert-crlf-to-lf-in-buffer
              db/sync-magit-repos-from-projectile
-             db/replace-variables-in-string))
+             db/replace-variables-in-string
+             db/dired-ediff-files))
 
 (use-package db-hydras
   :commands (hydra-toggle/body
@@ -1982,7 +1983,7 @@ respectively."
 
 (use-package dired
   :bind (:map dired-mode-map
-              ("e" . ora-ediff-files)
+              ("e" . db/dired-ediff-files)
               ("z" . dired-get-size)
               ([remap beginning-of-buffer] . dired-back-to-top)
               ([remap end-of-buffer] . dired-jump-to-bottom)
@@ -2057,28 +2058,6 @@ respectively."
             (dolist (extension '(".out" ".synctex.gz" ".thm"))
               (add-to-list 'dired-latex-unclean-extensions extension))
 
-            (defun ora-ediff-files ()
-              "Compare marked files in dired with ediff."
-              ;; from: https://oremacs.com/2017/03/18/dired-ediff/
-              (interactive)
-              (let ((files (dired-get-marked-files))
-                    (wnd (current-window-configuration)))
-                (if (<= (length files) 2)
-                    (let ((file1 (car files))
-                          (file2 (if (cdr files)
-                                     (cadr files)
-                                   (read-file-name
-                                    "file: "
-                                    (dired-dwim-target-directory)))))
-                      (if (file-newer-than-file-p file1 file2)
-                          (ediff-files file2 file1)
-                        (ediff-files file1 file2))
-                      (add-hook 'ediff-after-quit-hook-internal
-                                #'(lambda ()
-                                    (setq ediff-after-quit-hook-internal nil)
-                                    (set-window-configuration wnd))))
-                  (error "No more than 2 files should be marked"))))
-
             (defun dired-back-to-top ()
               "Jump to first non-trivial line in dired."
               (interactive)
diff --git a/site-lisp/db-utils.el b/site-lisp/db-utils.el
index 9acd457..ac6ff83 100644
--- a/site-lisp/db-utils.el
+++ b/site-lisp/db-utils.el
@@ -477,6 +477,29 @@ numbers allowed)."
                                                         #'string=)))
                             string))
 
+(defun db/dired-ediff-files ()
+  "Compare marked files in dired with ediff.
+
+From: https://oremacs.com/2017/03/18/dired-ediff/."
+  (interactive)
+  (let ((files (dired-get-marked-files))
+        (wnd (current-window-configuration)))
+    (if (<= (length files) 2)
+        (let ((file1 (car files))
+              (file2 (if (cdr files)
+                         (cadr files)
+                       (read-file-name
+                        "file: "
+                        (dired-dwim-target-directory)))))
+          (if (file-newer-than-file-p file1 file2)
+              (ediff-files file2 file1)
+            (ediff-files file1 file2))
+          (add-hook 'ediff-after-quit-hook-internal
+                    #'(lambda ()
+                        (setq ediff-after-quit-hook-internal nil)
+                        (set-window-configuration wnd))))
+      (error "No more than 2 files should be marked"))))
+
 
 ;;; Base45 Decoding