diff --git a/lisp/ChangeLog b/lisp/ChangeLog
index aa61efaaa67..eddd41438da 100644
--- a/lisp/ChangeLog
+++ b/lisp/ChangeLog
@@ -1,3 +1,7 @@
+2008-05-29  Juanma Barranquero  <lekktu@gmail.com>
+
+	* icomplete.el (icomplete-prospects-height): Add :group.
+
 2008-05-29  Stefan Monnier  <monnier@iro.umontreal.ca>
 
 	* icomplete.el (icomplete-prospects-length): Make obsolete.
diff --git a/lisp/icomplete.el b/lisp/icomplete.el
index 5e2639bb566..52636274633 100644
--- a/lisp/icomplete.el
+++ b/lisp/icomplete.el
@@ -77,7 +77,8 @@
   ;; try to guess the number of lines used up by icomplete-prospects-length.
   (+ 1 (/ (+ icomplete-prospects-length 20) (window-width)))
   "Maximum number of lines to use in the minibuffer."
-  :type 'integer)
+  :type 'integer
+  :group 'icomplete)
 
 (defcustom icomplete-compute-delay .3
   "Completions-computation stall, used only with large-number completions.