diff --git a/src/cpu/samsung/exynos5250/uart.c b/src/cpu/samsung/exynos5250/uart.c
index 3126d7a6e8..92ffd26599 100644
--- a/src/cpu/samsung/exynos5250/uart.c
+++ b/src/cpu/samsung/exynos5250/uart.c
@@ -119,6 +119,9 @@ static void exynos5_init_dev(void)
 //	struct s5p_uart *const uart = s5p_get_base_uart(dev_index);
 	struct s5p_uart *uart = (struct s5p_uart *)base_port;
 
+	// TODO initialize with correct peripheral id by base_port.
+	exynos_pinmux_config(PERIPH_ID_UART3, PINMUX_FLAG_NONE);
+
 	/* enable FIFOs */
 	writel(0x1, &uart->ufcon);
 	writel(0, &uart->umcon);