diff --git a/dts/arm/nordic/nrf5340_cpuapp.dtsi b/dts/arm/nordic/nrf5340_cpuapp.dtsi
index f6a2fb95dbb..904124c8c80 100644
--- a/dts/arm/nordic/nrf5340_cpuapp.dtsi
+++ b/dts/arm/nordic/nrf5340_cpuapp.dtsi
@@ -23,7 +23,6 @@
 			mpu: mpu@e000ed90 {
 				compatible = "arm,armv8m-mpu";
 				reg = <0xe000ed90 0x40>;
-				arm,num-mpu-regions = <16>;
 			};
 		};
 	};
diff --git a/dts/arm/nordic/nrf5340_cpuapp_qkaa.dtsi b/dts/arm/nordic/nrf5340_cpuapp_qkaa.dtsi
index 8db9eb27253..aeae491ed69 100644
--- a/dts/arm/nordic/nrf5340_cpuapp_qkaa.dtsi
+++ b/dts/arm/nordic/nrf5340_cpuapp_qkaa.dtsi
@@ -15,6 +15,10 @@
 	reg = <0x20000000 DT_SIZE_K(512)>;
 };
 
+&mpu {
+	arm,num-mpu-regions = <16>;
+};
+
 / {
 	soc {
 		compatible = "nordic,nRF5340-CPU0-QKAA", "nordic,nRF5340-CPU0", "nordic,nRF53", "simple-bus";
diff --git a/dts/arm/nordic/nrf5340_cpuappns.dtsi b/dts/arm/nordic/nrf5340_cpuappns.dtsi
index 6d7c24275e9..f16abc1211e 100644
--- a/dts/arm/nordic/nrf5340_cpuappns.dtsi
+++ b/dts/arm/nordic/nrf5340_cpuappns.dtsi
@@ -25,7 +25,6 @@
 			mpu: mpu@e000ed90 {
 				compatible = "arm,armv8m-mpu";
 				reg = <0xe000ed90 0x40>;
-				arm,num-mpu-regions = <16>;
 			};
 		};
 	};
diff --git a/dts/arm/nordic/nrf5340_cpuappns_qkaa.dtsi b/dts/arm/nordic/nrf5340_cpuappns_qkaa.dtsi
index 192ef051267..96f98bf191b 100644
--- a/dts/arm/nordic/nrf5340_cpuappns_qkaa.dtsi
+++ b/dts/arm/nordic/nrf5340_cpuappns_qkaa.dtsi
@@ -15,6 +15,10 @@
 	reg = <0x20000000 DT_SIZE_K(512)>;
 };
 
+&mpu {
+	arm,num-mpu-regions = <16>;
+};
+
 / {
 	soc {
 		compatible = "nordic,nRF5340-CPU0-QKAA", "nordic,nRF5340-CPU0", "nordic,nRF53", "simple-bus";