diff --git a/dts/arm/atmel/sam4s.dtsi b/dts/arm/atmel/sam4s.dtsi
index 4c49d58de5b..b871d877674 100644
--- a/dts/arm/atmel/sam4s.dtsi
+++ b/dts/arm/atmel/sam4s.dtsi
@@ -25,5 +25,5 @@
 };
 
 &nvic {
-	arm,num-irq-priority-bits = <3>;
+	arm,num-irq-priority-bits = <4>;
 };