diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c
index 49c08f07c969..b440d338a895 100644
--- a/drivers/usb/serial/ftdi_sio.c
+++ b/drivers/usb/serial/ftdi_sio.c
@@ -1671,7 +1671,7 @@ static ssize_t latency_timer_show(struct device *dev,
 	if (priv->flags & ASYNC_LOW_LATENCY)
 		return sprintf(buf, "1\n");
 	else
-		return sprintf(buf, "%i\n", priv->latency);
+		return sprintf(buf, "%u\n", priv->latency);
 }
 
 /* Write a new value of the latency timer, in units of milliseconds. */