diff --git a/org-contacts.el b/org-contacts.el
index b6d9e50..fbdf0fc 100644
--- a/org-contacts.el
+++ b/org-contacts.el
@@ -41,6 +41,7 @@
 
 (eval-and-compile
   (require 'org))
+(require 'gnus-util)
 
 (defgroup org-contacts nil
   "Options concerning contacts management."