Index: uspace/srv/hid/isdv4_tablet/main.c
===================================================================
--- uspace/srv/hid/isdv4_tablet/main.c	(revision b688fd884822ca3ea5bb45f1b6b2ca18b04efbcc)
+++ uspace/srv/hid/isdv4_tablet/main.c	(revision f9b2cb4cf365498e1fe141b1aa66950fbc3dcb17)
@@ -69,8 +69,10 @@
 	async_sess_t *sess =
 	    async_callback_receive(EXCHANGE_SERIALIZE);
+	
 	fibril_mutex_lock(&client_mutex);
-		if (client_sess == NULL) {
-			client_sess = sess;
-		}
+	
+	if (client_sess == NULL)
+		client_sess = sess;
+	
 	fibril_mutex_unlock(&client_mutex);
 
@@ -262,5 +264,5 @@
 	printf(NAME ": Using serial port %s\n", serial_port_name);
 
-	async_sess_t *sess = loc_service_connect(EXCHANGE_SERIALIZE, svc_id,
+	async_sess_t *sess = loc_service_connect(svc_id, INTERFACE_DDF,
 	    IPC_FLAG_BLOCKING);
 	if (!sess) {