diff --git a/sys/gnu/dts/arm/am33xx-l4.dtsi b/sys/gnu/dts/arm/am33xx-l4.dtsi
index ca6d9f02a800..8409500f7cca 100644
--- a/sys/gnu/dts/arm/am33xx-l4.dtsi
+++ b/sys/gnu/dts/arm/am33xx-l4.dtsi
@@ -185,7 +185,7 @@
 			uart0: serial@0 {
 				compatible = "ti,am3352-uart", "ti,omap3-uart";
 				clock-frequency = <48000000>;
-				reg = <0x0 0x2000>;
+				reg = <0x0 0x1000>;
 				interrupts = <72>;
 				status = "disabled";
 				dmas = <&edma 26 0>, <&edma 27 0>;