diff --git a/dts/arm/atmel/sam3x.dtsi b/dts/arm/atmel/sam3x.dtsi
index 3c610c8ed06..81fc9acacf6 100644
--- a/dts/arm/atmel/sam3x.dtsi
+++ b/dts/arm/atmel/sam3x.dtsi
@@ -35,5 +35,5 @@
 };
 
 &nvic {
-	arm,num-irq-priority-bits = <3>;
+	arm,num-irq-priority-bits = <4>;
 };