Index: openacs-4/packages/acs-admin/www/users/modify-admin-privileges.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/acs-admin/www/users/modify-admin-privileges.tcl,v
diff -u -r1.3 -r1.3.10.1
--- openacs-4/packages/acs-admin/www/users/modify-admin-privileges.tcl	10 Jan 2007 21:22:00 -0000	1.3
+++ openacs-4/packages/acs-admin/www/users/modify-admin-privileges.tcl	5 Aug 2014 10:08:56 -0000	1.3.10.1
@@ -5,7 +5,7 @@
     @cvs-id $Id$
 
 } {
-    user_id:notnull
+    user_id:naturalnum,notnull
     action:notnull
     confirmed_p:optional
 }