diff --git a/cores/arduino/CDC.cpp b/cores/arduino/CDC.cpp
index 142f8f66d..4ff6b9b42 100644
--- a/cores/arduino/CDC.cpp
+++ b/cores/arduino/CDC.cpp
@@ -41,7 +41,7 @@ static u8 wdtcsr_save;
 extern const CDCDescriptor _cdcInterface PROGMEM;
 const CDCDescriptor _cdcInterface =
 {
-	D_IAD(0,2,CDC_COMMUNICATION_INTERFACE_CLASS,CDC_ABSTRACT_CONTROL_MODEL,1),
+	D_IAD(0,2,CDC_COMMUNICATION_INTERFACE_CLASS,CDC_ABSTRACT_CONTROL_MODEL,0),
 
 	//	CDC communication interface
 	D_INTERFACE(CDC_ACM_INTERFACE,1,CDC_COMMUNICATION_INTERFACE_CLASS,CDC_ABSTRACT_CONTROL_MODEL,0),