diff --git a/cores/arduino/USB/CDC.cpp b/cores/arduino/USB/CDC.cpp
index 3c795f18e..c60388deb 100644
--- a/cores/arduino/USB/CDC.cpp
+++ b/cores/arduino/USB/CDC.cpp
@@ -150,6 +150,7 @@ void Serial_::begin(uint32_t /* baud_count */, uint8_t /* config */)
 
 void Serial_::end(void)
 {
+	memset((void*)&_usbLineInfo, 0, sizeof(_usbLineInfo));
 }
 
 int Serial_::available(void)
diff --git a/cores/arduino/USB/USBAPI.h b/cores/arduino/USB/USBAPI.h
index 690488b79..379f55ed3 100644
--- a/cores/arduino/USB/USBAPI.h
+++ b/cores/arduino/USB/USBAPI.h
@@ -58,6 +58,7 @@ class USBDeviceClass {
 
 	// USB Device API
 	void init();
+	bool end();
 	bool attach();
 	bool detach();
 	void setAddress(uint32_t addr);
diff --git a/cores/arduino/USB/USBCore.cpp b/cores/arduino/USB/USBCore.cpp
index 311903989..ee7b90a44 100644
--- a/cores/arduino/USB/USBCore.cpp
+++ b/cores/arduino/USB/USBCore.cpp
@@ -387,6 +387,13 @@ bool USBDeviceClass::detach()
 	return true;
 }
 
+bool USBDeviceClass::end() {
+	if (!initialized)
+		return false;
+	usbd.disable();
+	return true;
+}
+
 bool USBDeviceClass::configured()
 {
 	return _usbConfiguration != 0;