diff --git a/hardware/arduino/avr/cores/arduino/PluggableUSB.h b/hardware/arduino/avr/cores/arduino/PluggableUSB.h
index 23013eb7844..33108db91a0 100644
--- a/hardware/arduino/avr/cores/arduino/PluggableUSB.h
+++ b/hardware/arduino/avr/cores/arduino/PluggableUSB.h
@@ -50,8 +50,6 @@ int PUSB_GetDescriptor(int8_t t);
 
 bool PUSB_Setup(USBSetup& setup, u8 i);
 
-void PUSB_Begin();
-
 #endif
 
 #endif