diff --git a/drivers/tty/serial/zs.c b/drivers/tty/serial/zs.c
index 72a3c0d90f40..31e12645f66b 100644
--- a/drivers/tty/serial/zs.c
+++ b/drivers/tty/serial/zs.c
@@ -680,9 +680,9 @@ static void zs_status_handle(struct zs_port *zport, struct zs_port *zport_a)
 			uart_handle_dcd_change(uport,
 					       zport->mctrl & TIOCM_CAR);
 		if (delta & TIOCM_RNG)
-			uport->icount.dsr++;
-		if (delta & TIOCM_DSR)
 			uport->icount.rng++;
+		if (delta & TIOCM_DSR)
+			uport->icount.dsr++;
 
 		if (delta)
 			wake_up_interruptible(&uport->state->port.delta_msr_wait);