diff --git a/hardware/arduino/avr/cores/arduino/USBCore.cpp b/hardware/arduino/avr/cores/arduino/USBCore.cpp
index 5a4a08396..e00fb028e 100644
--- a/hardware/arduino/avr/cores/arduino/USBCore.cpp
+++ b/hardware/arduino/avr/cores/arduino/USBCore.cpp
@@ -494,8 +494,6 @@ bool SendConfiguration(int maxlen)
 	return true;
 }
 
-static u8 _cdcComposite = 0;
-
 static
 bool SendDescriptor(USBSetup& setup)
 {