diff --git a/eldoc-box.el b/eldoc-box.el
index b22d378..ae104ba 100644
--- a/eldoc-box.el
+++ b/eldoc-box.el
@@ -29,6 +29,8 @@
 ;;; Code:
 ;;
 
+(require 'cl-lib)
+
 ;;;; Userland
 ;;;;; Variable