diff --git a/arch/arm64/boot/dts/freescale/imx8mn-beacon-baseboard.dtsi b/arch/arm64/boot/dts/freescale/imx8mn-beacon-baseboard.dtsi
index 376ca8ff7213..e69fd41b46d0 100644
--- a/arch/arm64/boot/dts/freescale/imx8mn-beacon-baseboard.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mn-beacon-baseboard.dtsi
@@ -176,6 +176,7 @@
 	pinctrl-0 = <&pinctrl_uart3>;
 	assigned-clocks = <&clk IMX8MN_CLK_UART3>;
 	assigned-clock-parents = <&clk IMX8MN_SYS_PLL1_80M>;
+	uart-has-rtscts;
 	status = "okay";
 };
 
@@ -259,6 +260,8 @@
 		fsl,pins = <
 			MX8MN_IOMUXC_ECSPI1_SCLK_UART3_DCE_RX	0x40
 			MX8MN_IOMUXC_ECSPI1_MOSI_UART3_DCE_TX	0x40
+			MX8MN_IOMUXC_ECSPI1_MISO_UART3_DCE_CTS_B	0x40
+			MX8MN_IOMUXC_ECSPI1_SS0_UART3_DCE_RTS_B	0x40
 		>;
 	};