--- a/plugins/muc/muc.lib.lua	Sun Jun 13 20:37:09 2010 +0500
+++ b/plugins/muc/muc.lib.lua	Sun Jun 13 20:44:38 2010 +0500
@@ -91,7 +91,9 @@
 	elseif affiliation == "member" then
 		return "participant";
 	elseif not affiliation then
-		return self:is_moderated() and "visitor" or "participant";
+		if not self:is_members_only() then
+			return self:is_moderated() and "visitor" or "participant";
+		end
 	end
 end