diff --git a/include/drivers/arm/pl011.h b/include/drivers/arm/pl011.h
index d5ea890..ce6cdcf 100644
--- a/include/drivers/arm/pl011.h
+++ b/include/drivers/arm/pl011.h
@@ -71,6 +71,7 @@
 
 #define PL011_UARTFR_TXFF_BIT	5	/* Transmit FIFO full bit in UARTFR register */
 #define PL011_UARTFR_RXFE_BIT	4	/* Receive FIFO empty bit in UARTFR register */
+#define PL011_UARTFR_BUSY_BIT	3	/* UART busy bit in UARTFR register */
 
 /* Control reg bits */
 #if !PL011_GENERIC_UART