diff --git a/msc/BSC_ConnectionHandler.ttcn b/msc/BSC_ConnectionHandler.ttcn
index 9f74199..396c3f7 100644
--- a/msc/BSC_ConnectionHandler.ttcn
+++ b/msc/BSC_ConnectionHandler.ttcn
@@ -133,6 +133,7 @@
 	boolean ran_is_geran,
 	boolean use_osmux,
 	boolean use_ipv6,
+	boolean use_csd,
 	boolean verify_cell_id,
 	OCT3 common_id_last_eutran_plmn optional
 };