diff --git a/firmware/usb.c b/firmware/usb.c
index 08eacb865b..5f6cffd5b2 100644
--- a/firmware/usb.c
+++ b/firmware/usb.c
@@ -425,7 +425,9 @@ void usb_acknowledge(long id)
 void usb_init(void)
 {
     usb_state = USB_EXTRACTED;
+#ifdef HAVE_USBSTACK
     exclusive_ata_access = false;
+#endif
     usb_monitor_enabled = false;
     countdown = -1;