diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c
index f15e280b2495..95db67c07c34 100644
--- a/drivers/tty/serial/sh-sci.c
+++ b/drivers/tty/serial/sh-sci.c
@@ -2997,7 +2997,7 @@ static int sci_init_single(struct platform_device *dev,
 	port->flags		= UPF_FIXED_PORT | UPF_BOOT_AUTOCONF | p->flags;
 	port->fifosize		= sci_port->params->fifosize;
 
-	if (port->type == PORT_SCI) {
+	if (port->type == PORT_SCI && !dev->dev.of_node) {
 		if (sci_port->reg_size >= 0x20)
 			port->regshift = 2;
 		else