--- node_invite.install	Mon May 25 18:49:02 2009
+++ node_invite.install.new	Tue Jan 20 22:23:14 2009
@@ -13,7 +13,7 @@ function node_invite_install() {
 					,uid_inviter int(10) unsigned NOT NULL default '0'
 					,status varchar(50)
 					,sent int(11) unsigned NOT NULL default '0'
-					,acted_upon int(11) UNSIGNED DEFAULT NULL
+					,acted_upon int(11) unsigned NOT NULL default '0'
 					,notes_invitee text
 					,notes_inviter text
 					,PRIMARY KEY (iid)