diff --git a/src/machine/usb.go b/src/machine/usb.go
index 823dfdb5ff..c28462e536 100644
--- a/src/machine/usb.go
+++ b/src/machine/usb.go
@@ -266,18 +266,18 @@ func EnableCDC(txHandler func(), rxHandler func([]byte), setupHandler func(usb.S
 	ConfigureUSBEndpoint(usbDescriptor,
 		[]usb.EndpointConfig{
 			{
-				No:   usb.CDC_ENDPOINT_ACM,
-				IsIn: true,
-				Type: usb.ENDPOINT_TYPE_INTERRUPT,
+				Index: usb.CDC_ENDPOINT_ACM,
+				IsIn:  true,
+				Type:  usb.ENDPOINT_TYPE_INTERRUPT,
 			},
 			{
-				No:        usb.CDC_ENDPOINT_OUT,
+				Index:     usb.CDC_ENDPOINT_OUT,
 				IsIn:      false,
 				Type:      usb.ENDPOINT_TYPE_BULK,
 				RxHandler: rxHandler,
 			},
 			{
-				No:        usb.CDC_ENDPOINT_IN,
+				Index:     usb.CDC_ENDPOINT_IN,
 				IsIn:      true,
 				Type:      usb.ENDPOINT_TYPE_BULK,
 				TxHandler: txHandler,
@@ -285,7 +285,7 @@ func EnableCDC(txHandler func(), rxHandler func([]byte), setupHandler func(usb.S
 		},
 		[]usb.SetupConfig{
 			{
-				No:      usb.CDC_ACM_INTERFACE,
+				Index:   usb.CDC_ACM_INTERFACE,
 				Handler: setupHandler,
 			},
 		})
@@ -296,19 +296,19 @@ func ConfigureUSBEndpoint(desc descriptor.Descriptor, epSettings []usb.EndpointC
 
 	for _, ep := range epSettings {
 		if ep.IsIn {
-			endPoints[ep.No] = uint32(ep.Type | usb.EndpointIn)
+			endPoints[ep.Index] = uint32(ep.Type | usb.EndpointIn)
 			if ep.TxHandler != nil {
-				usbTxHandler[ep.No] = ep.TxHandler
+				usbTxHandler[ep.Index] = ep.TxHandler
 			}
 		} else {
-			endPoints[ep.No] = uint32(ep.Type | usb.EndpointOut)
+			endPoints[ep.Index] = uint32(ep.Type | usb.EndpointOut)
 			if ep.RxHandler != nil {
-				usbRxHandler[ep.No] = ep.RxHandler
+				usbRxHandler[ep.Index] = ep.RxHandler
 			}
 		}
 	}
 
 	for _, s := range setup {
-		usbSetupHandler[s.No] = s.Handler
+		usbSetupHandler[s.Index] = s.Handler
 	}
 }
diff --git a/src/machine/usb/adc/midi/midi.go b/src/machine/usb/adc/midi/midi.go
index d0ce3ee1fc..30b645ee23 100644
--- a/src/machine/usb/adc/midi/midi.go
+++ b/src/machine/usb/adc/midi/midi.go
@@ -44,13 +44,13 @@ func newMidi() *midi {
 	machine.ConfigureUSBEndpoint(descriptor.CDCMIDI,
 		[]usb.EndpointConfig{
 			{
-				No:        usb.MIDI_ENDPOINT_OUT,
+				Index:     usb.MIDI_ENDPOINT_OUT,
 				IsIn:      false,
 				Type:      usb.ENDPOINT_TYPE_BULK,
 				RxHandler: m.RxHandler,
 			},
 			{
-				No:        usb.MIDI_ENDPOINT_IN,
+				Index:     usb.MIDI_ENDPOINT_IN,
 				IsIn:      true,
 				Type:      usb.ENDPOINT_TYPE_BULK,
 				TxHandler: m.Handler,
diff --git a/src/machine/usb/config.go b/src/machine/usb/config.go
index de620e7aa6..ef7cd31530 100644
--- a/src/machine/usb/config.go
+++ b/src/machine/usb/config.go
@@ -1,7 +1,7 @@
 package usb
 
 type EndpointConfig struct {
-	No        uint8
+	Index     uint8
 	IsIn      bool
 	TxHandler func()
 	RxHandler func([]byte)
@@ -9,6 +9,6 @@ type EndpointConfig struct {
 }
 
 type SetupConfig struct {
-	No      uint8
+	Index   uint8
 	Handler func(Setup) bool
 }
diff --git a/src/machine/usb/hid/hid.go b/src/machine/usb/hid/hid.go
index 4a17f953a8..e73c7a4a2b 100644
--- a/src/machine/usb/hid/hid.go
+++ b/src/machine/usb/hid/hid.go
@@ -36,7 +36,7 @@ func SetHandler(d hidDevicer) {
 		machine.ConfigureUSBEndpoint(descriptor.CDCHID,
 			[]usb.EndpointConfig{
 				{
-					No:        usb.HID_ENDPOINT_IN,
+					Index:     usb.HID_ENDPOINT_IN,
 					IsIn:      true,
 					Type:      usb.ENDPOINT_TYPE_INTERRUPT,
 					TxHandler: handler,
@@ -44,7 +44,7 @@ func SetHandler(d hidDevicer) {
 			},
 			[]usb.SetupConfig{
 				{
-					No:      usb.HID_INTERFACE,
+					Index:   usb.HID_INTERFACE,
 					Handler: setupHandler,
 				},
 			})
diff --git a/src/machine/usb/hid/joystick/joystick.go b/src/machine/usb/hid/joystick/joystick.go
index 18a4d470e4..2c2f719c0d 100644
--- a/src/machine/usb/hid/joystick/joystick.go
+++ b/src/machine/usb/hid/joystick/joystick.go
@@ -51,13 +51,13 @@ func UseSettings(def Definitions, rxHandlerFunc func(b []byte), setupFunc func(s
 	machine.ConfigureUSBEndpoint(descriptor.CDCJoystick,
 		[]usb.EndpointConfig{
 			{
-				No:        usb.HID_ENDPOINT_OUT,
+				Index:     usb.HID_ENDPOINT_OUT,
 				IsIn:      false,
 				Type:      usb.ENDPOINT_TYPE_INTERRUPT,
 				RxHandler: rxHandlerFunc,
 			},
 			{
-				No:        usb.HID_ENDPOINT_IN,
+				Index:     usb.HID_ENDPOINT_IN,
 				IsIn:      true,
 				Type:      usb.ENDPOINT_TYPE_INTERRUPT,
 				TxHandler: js.handler,
@@ -65,7 +65,7 @@ func UseSettings(def Definitions, rxHandlerFunc func(b []byte), setupFunc func(s
 		},
 		[]usb.SetupConfig{
 			{
-				No:      usb.HID_INTERFACE,
+				Index:   usb.HID_INTERFACE,
 				Handler: setupFunc,
 			},
 		},