diff --git a/lisp/org/org-gnus.el b/lisp/org/org-gnus.el
index 428aa8b9411..02e7075da66 100644
--- a/lisp/org/org-gnus.el
+++ b/lisp/org/org-gnus.el
@@ -34,7 +34,7 @@
 ;;; Code:
 
 (require 'org)
-(require 'gnus-sum)
+(eval-when-compile (require 'gnus-sum))
 
 ;; Customization variables