1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/serial/mcf.c b/drivers/serial/mcf.c
index 051fcc2f5ba8..e76fc72c9b36 100644
--- a/drivers/serial/mcf.c
+++ b/drivers/serial/mcf.c
@@ -434,7 +434,7 @@ static struct uart_ops mcf_uart_ops = {
 
 static struct mcf_uart mcf_ports[3];
 
-#define MCF_MAXPORTS    (sizeof(mcf_ports) / sizeof(struct mcf_uart))
+#define MCF_MAXPORTS    ARRAY_SIZE(mcf_ports)
 
 /****************************************************************************/
 #if defined(CONFIG_SERIAL_MCF_CONSOLE)