diff --git a/boards/arm/mps3/mps3_an547_ns_defconfig b/boards/arm/mps3/mps3_an547_ns_defconfig
index dcf5a170340..ccc25c35019 100644
--- a/boards/arm/mps3/mps3_an547_ns_defconfig
+++ b/boards/arm/mps3/mps3_an547_ns_defconfig
@@ -6,7 +6,6 @@
 
 CONFIG_ARM_TRUSTZONE_M=y
 CONFIG_RUNTIME_NMI=y
-CONFIG_TRUSTED_EXECUTION_NONSECURE=y
 CONFIG_ARM_MPU=y
 CONFIG_QEMU_ICOUNT_SHIFT=6
 
@@ -17,3 +16,7 @@ CONFIG_GPIO=y
 CONFIG_CONSOLE=y
 CONFIG_UART_CONSOLE=y
 CONFIG_SERIAL=y
+
+# Build a Non-secure firmware image
+CONFIG_TRUSTED_EXECUTION_SECURE=n
+CONFIG_TRUSTED_EXECUTION_NONSECURE=y