diff --git a/cores/arduino/USBAPI.h b/cores/arduino/USBAPI.h
index f66cb16..1c21845 100644
--- a/cores/arduino/USBAPI.h
+++ b/cores/arduino/USBAPI.h
@@ -9,17 +9,17 @@
 //================================================================================
 //	USB
 
-class USB_
+class USBDevice_
 {
 public:
-	USB_();
+	USBDevice_();
 	bool configured();
 
 	void attach();
 	void detach();	// Serial port goes down too...
 	void poll();
 };
-extern USB_ USB;
+extern USBDevice_ USBDevice;
 
 //================================================================================
 //================================================================================
diff --git a/cores/arduino/USBCore.cpp b/cores/arduino/USBCore.cpp
index 9e89fd6..6766be6 100644
--- a/cores/arduino/USBCore.cpp
+++ b/cores/arduino/USBCore.cpp
@@ -627,13 +627,13 @@ u8 USBConnected()
 //=======================================================================
 //=======================================================================
 
-USB_ USB;
+USBDevice_ USBDevice;
 
-USB_::USB_()
+USBDevice_::USBDevice_()
 {
 }
 
-void USB_::attach()
+void USBDevice_::attach()
 {
 	_usbConfiguration = 0;
 	UHWCON = 0x01;						// power internal reg
@@ -654,18 +654,18 @@ void USB_::attach()
 	TX_RX_LED_INIT;
 }
 
-void USB_::detach()
+void USBDevice_::detach()
 {
 }
 
 //	Check for interrupts
 //	TODO: VBUS detection
-bool USB_::configured()
+bool USBDevice_::configured()
 {
 	return _usbConfiguration;
 }
 
-void USB_::poll()
+void USBDevice_::poll()
 {
 }
 
diff --git a/cores/arduino/main.cpp b/cores/arduino/main.cpp
old mode 100755
new mode 100644
index 34450f4..3d4e079
--- a/cores/arduino/main.cpp
+++ b/cores/arduino/main.cpp
@@ -5,7 +5,7 @@ int main(void)
 	init();
 
 #if defined(USBCON)
-	USB.attach();
+	USBDevice.attach();
 #endif
 	
 	setup();