--- a/core/rostermanager.lua	Fri Apr 03 20:30:14 2015 +0200
+++ b/core/rostermanager.lua	Fri Apr 03 21:42:30 2015 +0200
@@ -13,6 +13,7 @@
 
 local pairs = pairs;
 local tostring = tostring;
+local type = type;
 
 local hosts = hosts;
 local bare_sessions = prosody.bare_sessions;