diff --git a/ttcn3-pcu-test/PCU_Tests.cfg b/ttcn3-pcu-test/PCU_Tests.cfg
index 17ab6c6c..92f5d8a0 100644
--- a/ttcn3-pcu-test/PCU_Tests.cfg
+++ b/ttcn3-pcu-test/PCU_Tests.cfg
@@ -11,6 +11,7 @@
 [MODULE_PARAMETERS]
 PCU_Tests.mp_pcu_sock_path := "/data/unix/pcu_bts"
 SGSN_Components.mp_nsconfig := {
+	address_family := AF_INET,
 	local_ip := "172.18.13.10",
 	local_udp_port := 23000,
 	remote_ip := "172.18.13.101",
diff --git a/ttcn3-pcu-test/sns/PCU_Tests.cfg b/ttcn3-pcu-test/sns/PCU_Tests.cfg
index 60f375b0..f441d180 100644
--- a/ttcn3-pcu-test/sns/PCU_Tests.cfg
+++ b/ttcn3-pcu-test/sns/PCU_Tests.cfg
@@ -9,6 +9,7 @@
 [MODULE_PARAMETERS]
 PCU_Tests.mp_pcu_sock_path := "/data/unix/pcu_bts"
 SGSN_Components.mp_nsconfig := {
+	address_family := AF_INET,
 	local_ip := "172.18.14.10",
 	local_udp_port := 23000,
 	remote_ip := "172.18.14.101",
diff --git a/ttcn3-sgsn-test/SGSN_Tests.cfg b/ttcn3-sgsn-test/SGSN_Tests.cfg
index f7d6d9a9..055ae5ab 100644
--- a/ttcn3-sgsn-test/SGSN_Tests.cfg
+++ b/ttcn3-sgsn-test/SGSN_Tests.cfg
@@ -14,14 +14,17 @@
 [MODULE_PARAMETERS]
 SGSN_Tests.mp_nsconfig := {
 	{
+		address_family := AF_INET,
 		local_ip := "172.18.8.103",
 		remote_ip := "172.18.8.10"
 	},
 	{
+		address_family := AF_INET,
 		local_ip := "172.18.8.103",
 		remote_ip := "172.18.8.10"
 	},
 	{
+		address_family := AF_INET,
 		local_ip := "172.18.8.103",
 		remote_ip := "172.18.8.10"
 	}