diff --git a/org-ql.el b/org-ql.el
index db3fb85..b4652e3 100644
--- a/org-ql.el
+++ b/org-ql.el
@@ -34,6 +34,7 @@
 ;;;; Requirements
 
 (require 'cl-lib)
+(require 'map)
 (require 'org)
 (require 'org-element)
 (require 'org-habit)