diff --git a/dired-aux.el b/dired-aux.el
index 9bcb1f9..7c1b5e3 100644
--- a/dired-aux.el
+++ b/dired-aux.el
@@ -38,6 +38,7 @@
 ;; We need macros in dired.el to compile properly,
 ;; and we call subroutines in it too.
 (require 'dired)
+(require 'cl-lib)
 
 (defvar dired-create-files-failures nil
   "Variable where `dired-create-files' records failing file names.