diff --git a/drivers/serial/sh-sci.c b/drivers/serial/sh-sci.c
index 512266307866d5c99784499b7d025eab47294b49..430754ebac8a69af20f716e82d2342cfb32ea32b 100644
--- a/drivers/serial/sh-sci.c
+++ b/drivers/serial/sh-sci.c
@@ -967,7 +967,7 @@ static int sci_startup(struct uart_port *port)
 #endif
 
 	sci_request_irq(s);
-	sci_start_tx(port, 1);
+	sci_start_tx(port);
 	sci_start_rx(port, 1);
 
 	return 0;