diff --git a/drivers/usb/usb_device.c b/drivers/usb/usb_device.c
index 27b78e7..8f73a6b 100644
--- a/drivers/usb/usb_device.c
+++ b/drivers/usb/usb_device.c
@@ -611,6 +611,17 @@
 	return USBD_OK;
 }
 
+static void usb_core_start_xfer(struct usb_handle *pdev,
+				void *handle,
+				struct usbd_ep *ep)
+{
+	if (ep->num == 0U) {
+		pdev->driver->ep0_start_xfer(handle, ep);
+	} else {
+		pdev->driver->ep_start_xfer(handle, ep);
+	}
+}
+
 /*
  * usb_core_receive
  *          Receive an amount of data
@@ -640,11 +651,7 @@
 	ep->is_in = false;
 	ep->num = num;
 
-	if (num == 0U) {
-		pdev->driver->ep0_start_xfer(hpcd->instance, ep);
-	} else {
-		pdev->driver->ep_start_xfer(hpcd->instance, ep);
-	}
+	usb_core_start_xfer(pdev, hpcd->instance, ep);
 
 	return USBD_OK;
 }
@@ -678,11 +685,7 @@
 	ep->is_in = true;
 	ep->num = num;
 
-	if (num == 0U) {
-		pdev->driver->ep0_start_xfer(hpcd->instance, ep);
-	} else {
-		pdev->driver->ep_start_xfer(hpcd->instance, ep);
-	}
+	usb_core_start_xfer(pdev, hpcd->instance, ep);
 
 	return USBD_OK;
 }