diff --git a/src/x9d/board_x9d.h b/src/x9d/board_x9d.h
index d503499ac..ff7a9a9cb 100644
--- a/src/x9d/board_x9d.h
+++ b/src/x9d/board_x9d.h
@@ -80,6 +80,7 @@ extern uint16_t sessionTimer;
 
 uint8_t usbPlugged(void);
 #define BOOTLOADER_REQUEST() (0)
+#define usbBootloader() (0)
 
 #define SLAVE_MODE() (0/*pwrCheck() == e_power_trainer*/)