diff --git a/arch/mips/boot/dts/ralink/mt7621.dtsi b/arch/mips/boot/dts/ralink/mt7621.dtsi
index 35a10258f235..dca415fddd90 100644
--- a/arch/mips/boot/dts/ralink/mt7621.dtsi
+++ b/arch/mips/boot/dts/ralink/mt7621.dtsi
@@ -123,6 +123,9 @@ serial0: serial@c00 {
 			reg-shift = <2>;
 			reg-io-width = <4>;
 			no-loopback-test;
+
+			pinctrl-names = "default";
+			pinctrl-0 = <&uart1_pins>;
 		};
 
 		spi0: spi@b00 {