diff --git a/examples/hub_demo/hub_demo.ino b/examples/hub_demo/hub_demo.ino
index adc1751f..ab77c345 100644
--- a/examples/hub_demo/hub_demo.ino
+++ b/examples/hub_demo/hub_demo.ino
@@ -96,7 +96,7 @@ void loop()
   Usb.Task();
 
   if ( Usb.getUsbTaskState() == USB_STATE_RUNNING ) {
-    if ((millis() - next_time) >= 0L) {
+    if ((long)(millis() - next_time) >= 0L) {
       Usb.ForEachUsbDevice(&PrintAllDescriptors);
       Usb.ForEachUsbDevice(&PrintAllAddresses);