diff --git a/lisp/cedet/ede/base.el b/lisp/cedet/ede/base.el
index 305bf599151..c32d2edd7b7 100644
--- a/lisp/cedet/ede/base.el
+++ b/lisp/cedet/ede/base.el
@@ -312,7 +312,8 @@ All specific project types must derive from this project."
   "File containing the list of projects EDE has viewed.
 If set to nil, then the cache is not saved."
   :group 'ede
-  :type 'file)
+  :type '(choice (const :tag "Don't save the cache" nil)
+                 file))
 
 (defvar ede-project-cache-files nil
   "List of project files EDE has seen before.")