diff --git a/drivers/tty/serial/men_z135_uart.c b/drivers/tty/serial/men_z135_uart.c
index 6fad57fee912..9138fa29d301 100644
--- a/drivers/tty/serial/men_z135_uart.c
+++ b/drivers/tty/serial/men_z135_uart.c
@@ -16,6 +16,7 @@
 #include <linux/tty_flip.h>
 #include <linux/bitops.h>
 #include <linux/mcb.h>
+#include <linux/slab.h>
 
 #define MEN_Z135_MAX_PORTS		12
 #define MEN_Z135_BASECLK		29491200
@@ -811,7 +812,7 @@ static int men_z135_probe(struct mcb_device *mdev,
 	if (!uart)
 		return -ENOMEM;
 
-	uart->rxbuf = (unsigned char *)__get_free_page(GFP_KERNEL);
+	uart->rxbuf = kmalloc(PAGE_SIZE, GFP_KERNEL);
 	if (!uart->rxbuf)
 		return -ENOMEM;
 
@@ -841,7 +842,7 @@ static int men_z135_probe(struct mcb_device *mdev,
 	return 0;
 
 err:
-	free_page((unsigned long) uart->rxbuf);
+	kfree(uart->rxbuf);
 	dev_err(dev, "Failed to add UART: %d\n", err);
 
 	return err;
@@ -858,7 +859,7 @@ static void men_z135_remove(struct mcb_device *mdev)
 
 	line--;
 	uart_remove_one_port(&men_z135_driver, &uart->port);
-	free_page((unsigned long) uart->rxbuf);
+	kfree(uart->rxbuf);
 }
 
 static const struct mcb_device_id men_z135_ids[] = {