diff --git a/[refs] b/[refs]
index bb787480d849..0f09a5f17119 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: ae91d60ba88ef0bdb1b5e9b2363bd52fc45d2af7
+refs/heads/master: 022d917d9621ee79e6f6782fbddd582b8f941024
diff --git a/trunk/drivers/serial/m32r_sio.c b/trunk/drivers/serial/m32r_sio.c
index 348ee2c19b58..c2bb11c02bde 100644
--- a/trunk/drivers/serial/m32r_sio.c
+++ b/trunk/drivers/serial/m32r_sio.c
@@ -421,7 +421,7 @@ static void transmit_chars(struct uart_sio_port *up)
 		up->port.icount.tx++;
 		if (uart_circ_empty(xmit))
 			break;
-		while (!serial_in(up, UART_LSR) & UART_LSR_THRE);
+		while (!(serial_in(up, UART_LSR) & UART_LSR_THRE));
 
 	} while (--count > 0);