Index: openacs-4/packages/acs-admin/www/users/become.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/acs-admin/www/users/become.tcl,v
diff -u -r1.3 -r1.3.16.1
--- openacs-4/packages/acs-admin/www/users/become.tcl	13 Jan 2005 13:54:41 -0000	1.3
+++ openacs-4/packages/acs-admin/www/users/become.tcl	5 Aug 2014 10:08:56 -0000	1.3.16.1
@@ -5,6 +5,6 @@
     @creation-date 27 Jan 2000
 
 } {
-    user_id
+    user_id:naturalnum,notnull
 }