diff --git a/STM32/cores/arduino/main.cpp b/STM32/cores/arduino/main.cpp
index fe2ecda..3c00744 100644
--- a/STM32/cores/arduino/main.cpp
+++ b/STM32/cores/arduino/main.cpp
@@ -47,7 +47,9 @@ int main(void)
 
 	initVariant();
 
+    #if defined(USB_BASE) || defined(USB_OTG_DEVICE_BASE)
 	USBDeviceFS.beginMenuSelection();
+    #endif
 	
 	setup();
     
diff --git a/STM32/cores/arduino/stm32/USBDevice.cpp b/STM32/cores/arduino/stm32/USBDevice.cpp
index 3cae51c..c2b5bc6 100644
--- a/STM32/cores/arduino/stm32/USBDevice.cpp
+++ b/STM32/cores/arduino/stm32/USBDevice.cpp
@@ -22,6 +22,8 @@
 
 #include "Arduino.h"
 
+#if defined(USB_BASE) || defined(USB_OTG_DEVICE_BASE)
+
 #include "USBDevice.h"
 #include "usbd_core.h"
 #include "usbd_desc.h"
@@ -123,3 +125,5 @@ extern "C" void USBSerial_Rx_Handler(uint8_t *data, uint16_t len){
 USBD_HandleTypeDef hUsbDeviceFS;
 
 USBDeviceClass USBDeviceFS;
+
+#endif