diff --git a/drivers/tty/serial/mcf.c b/drivers/tty/serial/mcf.c
index 7dbfb4cde124..ea58b4a9404f 100644
--- a/drivers/tty/serial/mcf.c
+++ b/drivers/tty/serial/mcf.c
@@ -479,7 +479,7 @@ static const struct uart_ops mcf_uart_ops = {
 	.verify_port	= mcf_verify_port,
 };
 
-static struct mcf_uart mcf_ports[4];
+static struct mcf_uart mcf_ports[10];
 
 #define	MCF_MAXPORTS	ARRAY_SIZE(mcf_ports)