diff --git a/lisp/image.el b/lisp/image.el
index edbf6c54df6..87fab80aad8 100644
--- a/lisp/image.el
+++ b/lisp/image.el
@@ -27,6 +27,8 @@
 
 (defgroup image ()
   "Image support."
+  :prefix "image-"
+  :link '(info-link "(emacs) Image Mode")
   :group 'multimedia)
 
 (declare-function image-flush "image.c" (spec &optional frame))