diff --git a/lisp/emacs-lisp/disass.el b/lisp/emacs-lisp/disass.el
index 7625ff829fc73b0a1951803b8eb446ba5958ecfd..2faad60865f6ceb04b2ea7765b5b38b6c3944449 100644
--- a/lisp/emacs-lisp/disass.el
+++ b/lisp/emacs-lisp/disass.el
@@ -36,6 +36,7 @@
 ;;; Code:
 
 (require 'macroexp)
+(require 'cl-lib)
 
 ;; The variable byte-code-vector is defined by the new bytecomp.el.
 ;; The function byte-decompile-lapcode is defined in byte-opt.el.