diff --git a/drivers/tty/serial/samsung_tty.c b/drivers/tty/serial/samsung_tty.c
index 857afcd5fe2d..c3ab2ff91862 100644
--- a/drivers/tty/serial/samsung_tty.c
+++ b/drivers/tty/serial/samsung_tty.c
@@ -2820,8 +2820,8 @@ static struct s3c24xx_serial_drv_data exynos5433_serial_drv_data = {
 #define EXYNOS4210_SERIAL_DRV_DATA ((kernel_ulong_t)&exynos4210_serial_drv_data)
 #define EXYNOS5433_SERIAL_DRV_DATA ((kernel_ulong_t)&exynos5433_serial_drv_data)
 #else
-#define EXYNOS4210_SERIAL_DRV_DATA (kernel_ulong_t)NULL
-#define EXYNOS5433_SERIAL_DRV_DATA (kernel_ulong_t)NULL
+#define EXYNOS4210_SERIAL_DRV_DATA ((kernel_ulong_t)NULL)
+#define EXYNOS5433_SERIAL_DRV_DATA ((kernel_ulong_t)NULL)
 #endif
 
 #ifdef CONFIG_ARCH_APPLE