diff --git a/src/ejabberd_c2s.erl b/src/ejabberd_c2s.erl
index 33d76b07c..5d8a7bb07 100644
--- a/src/ejabberd_c2s.erl
+++ b/src/ejabberd_c2s.erl
@@ -107,7 +107,7 @@
 		auth_module = unknown,
 		ip,
 		aux_fields = [],
-		lang}).
+		lang = <<"">>}).
 
 %-define(DBGFSM, true).