diff --git a/arch/arm/boot/dts/at91sam9g45.dtsi b/arch/arm/boot/dts/at91sam9g45.dtsi
index af8b708ac312..8837b7e4292c 100644
--- a/arch/arm/boot/dts/at91sam9g45.dtsi
+++ b/arch/arm/boot/dts/at91sam9g45.dtsi
@@ -978,7 +978,7 @@ macb0: ethernet@fffbc000 {
 
 			trng@fffcc000 {
 				compatible = "atmel,at91sam9g45-trng";
-				reg = <0xfffcc000 0x4000>;
+				reg = <0xfffcc000 0x100>;
 				interrupts = <6 IRQ_TYPE_LEVEL_HIGH 0>;
 				clocks = <&trng_clk>;
 			};