diff --git a/rs485hid/rs485gw.c b/rs485hid/rs485gw.c
index 102c8c4..985b235 100644
--- a/rs485hid/rs485gw.c
+++ b/rs485hid/rs485gw.c
@@ -24,7 +24,7 @@
  *
  */
 
-#include <usbd_cdc_if.h>
+#include <si_usb.h>
 
 #include <misc.h>
 
diff --git a/si_usb.c b/si_usb.c
index bf2a231..9d24ea2 100644
--- a/si_usb.c
+++ b/si_usb.c
@@ -6,7 +6,6 @@
 
 #include <usb_device.h>
 
-#if 1
 static void
 usb_cdc_init(const void *foo)
 {
@@ -24,5 +23,4 @@ USB_LP_IRQHandler(void)
 	HAL_PCD_IRQHandler(&hpcd_USB_FS);
 }
 
-SYSINIT(abkdkd, SI_SUB_CONSOLE, SI_ORDER_FIRST, usb_cdc_init, NULL);
-#endif
+SYSINIT(usb_cdc_init, SI_SUB_CONSOLE, SI_ORDER_FIRST, usb_cdc_init, NULL);
diff --git a/si_usb.h b/si_usb.h
new file mode 100644
index 0000000..29971d8
--- /dev/null
+++ b/si_usb.h
@@ -0,0 +1,8 @@
+
+/*
+ * defines FILE *vcp_usb, usb_printf and vcp_status
+ *
+ * vcp_status returns if host has set DTR (presence) or not.
+ */
+#include <usbd_cdc_if.h>
+