diff --git a/arch/arm/boot/dts/meson.dtsi b/arch/arm/boot/dts/meson.dtsi
index 8bae6ed0abb2..bd0e864964e9 100644
--- a/arch/arm/boot/dts/meson.dtsi
+++ b/arch/arm/boot/dts/meson.dtsi
@@ -50,6 +50,7 @@ uart_A: serial@84c0 {
 				compatible = "amlogic,meson6-uart", "amlogic,meson-uart";
 				reg = <0x84c0 0x18>;
 				interrupts = <GIC_SPI 26 IRQ_TYPE_EDGE_RISING>;
+				fifo-size = <128>;
 				status = "disabled";
 			};