diff --git a/sys/arm/at91/uart_dev_at91usart.c b/sys/arm/at91/uart_dev_at91usart.c
index 0f50fb42612e..77ab0ca8c103 100644
--- a/sys/arm/at91/uart_dev_at91usart.c
+++ b/sys/arm/at91/uart_dev_at91usart.c
@@ -307,6 +307,10 @@ static kobj_method_t at91_usart_methods[] = {
 int
 at91_usart_bus_probe(struct uart_softc *sc)
 {
+
+	sc->sc_txfifosz = USART_BUFFER_SIZE;
+	sc->sc_rxfifosz = USART_BUFFER_SIZE;
+	sc->sc_hwiflow = 0;
 	return (0);
 }
 
@@ -344,10 +348,6 @@ at91_usart_bus_attach(struct uart_softc *sc)
 		atsc->flags |= HAS_TIMEOUT;
 	WR4(&sc->sc_bas, USART_IDR, 0xffffffff);
 
-	sc->sc_txfifosz = USART_BUFFER_SIZE;
-	sc->sc_rxfifosz = USART_BUFFER_SIZE;
-	sc->sc_hwiflow = 0;
-
 #ifndef SKYEYE_WORKAROUNDS
 	/*
 	 * Allocate DMA tags and maps