diff --git a/lisp/gnus/mm-view.el b/lisp/gnus/mm-view.el
index a3d6e74fbcb..edc2d39cd0f 100644
--- a/lisp/gnus/mm-view.el
+++ b/lisp/gnus/mm-view.el
@@ -629,6 +629,8 @@ If MODE is not set, try to find mode automatically."
     (replace-match "\n"))
   t)
 
+(autoload 'epg-decrypt-string "epg")
+
 (defun mm-view-pkcs7-decrypt (handle &optional from)
   (insert-buffer-substring (mm-handle-buffer handle))
   (goto-char (point-min))