diff --git a/.emacs.d/lisp/init-notmuch-sync.el b/.emacs.d/lisp/init-notmuch-sync.el
index ed10fa01..b25b1f91 100644
--- a/.emacs.d/lisp/init-notmuch-sync.el
+++ b/.emacs.d/lisp/init-notmuch-sync.el
@@ -1,5 +1,6 @@
 ;; TODO: Report notmuch dump/tag sync technique upstream.
 (require 'seq)
+(require 'cl-lib)
 
 (unless (boundp 'notmuch-command)
   ;; So that this file can be use in external scripts without require