diff --git a/gtests/net/packetdrill/run_system_call.c b/gtests/net/packetdrill/run_system_call.c
index 0f3b354e5988a31501f5b28486e148460a79aa8d..51311ff7e4d6e1b0874129e166905db4e7d237d2 100644
--- a/gtests/net/packetdrill/run_system_call.c
+++ b/gtests/net/packetdrill/run_system_call.c
@@ -1768,6 +1768,8 @@ static struct socket *insert_new_socket(
 	socket->protocol	= protocol;
 	socket->script.fd	= script_fd;
 	socket->live.fd		= live_fd;
+	socket->script.remote.ip.address_family = address_family;
+	socket->script.local.ip.address_family = address_family;
 	return socket;
 }