diff --git a/SerialPorts.c b/SerialPorts.c
index 1ebaef5..90d6ba3 100644
--- a/SerialPorts.c
+++ b/SerialPorts.c
@@ -558,7 +558,7 @@ void SerialPorts_Init(tRs485DirectionPins *directionPins) {
     env->cliVirtualInIo = SerialPortP2p_GetIoFirst(&env->cliVirtualPort);
     env->cliVirtualOutIo = SerialPortP2p_GetIoSecond(&env->cliVirtualPort);
 */
-    SerialPortUsb_Init(&env->SerialPortUsb, 1024, 1024);
+    SerialPortUsb_Init(&env->SerialPortUsb, 1, 1024, 1024);
     env->SerialPortUsbIO = SerialPortUsb_GetIo(&env->SerialPortUsb);
     env->SerialPortUsbSnifferIO = SerialPortUsb_GetSnifferIo(&env->SerialPortUsb);