diff --git a/drivers/char/mxser.c b/drivers/char/mxser.c
index 13f8871..9533f43 100644
--- a/drivers/char/mxser.c
+++ b/drivers/char/mxser.c
@@ -547,14 +547,18 @@
 	return (inb(mp->ioaddr + UART_MSR) & UART_MSR_DCD)?1:0;
 }
 
-static void mxser_raise_dtr_rts(struct tty_port *port)
+static void mxser_dtr_rts(struct tty_port *port, int on)
 {
 	struct mxser_port *mp = container_of(port, struct mxser_port, port);
 	unsigned long flags;
 
 	spin_lock_irqsave(&mp->slock, flags);
-	outb(inb(mp->ioaddr + UART_MCR) |
-		UART_MCR_DTR | UART_MCR_RTS, mp->ioaddr + UART_MCR);
+	if (on)
+		outb(inb(mp->ioaddr + UART_MCR) |
+			UART_MCR_DTR | UART_MCR_RTS, mp->ioaddr + UART_MCR);
+	else
+		outb(inb(mp->ioaddr + UART_MCR)&~(UART_MCR_DTR | UART_MCR_RTS),
+			mp->ioaddr + UART_MCR);
 	spin_unlock_irqrestore(&mp->slock, flags);
 }
 
@@ -2356,7 +2360,7 @@
 
 struct tty_port_operations mxser_port_ops = {
 	.carrier_raised = mxser_carrier_raised,
-	.raise_dtr_rts = mxser_raise_dtr_rts,
+	.dtr_rts = mxser_dtr_rts,
 };
 
 /*