diff --git a/drivers/tty/serial/max3100.c b/drivers/tty/serial/max3100.c
index b3e63b6a402e..3d2b83d6ab51 100644
--- a/drivers/tty/serial/max3100.c
+++ b/drivers/tty/serial/max3100.c
@@ -45,6 +45,9 @@
 #include <linux/freezer.h>
 #include <linux/tty.h>
 #include <linux/tty_flip.h>
+#include <linux/types.h>
+
+#include <asm/unaligned.h>
 
 #include <linux/serial_max3100.h>
 
@@ -191,7 +194,7 @@ static void max3100_timeout(struct timer_list *t)
 static int max3100_sr(struct max3100_port *s, u16 tx, u16 *rx)
 {
 	struct spi_message message;
-	u16 etx, erx;
+	__be16 etx, erx;
 	int status;
 	struct spi_transfer tran = {
 		.tx_buf = &etx,