diff --git a/_projects/armv8m33-mcxn94x-frdm/build.project b/_projects/armv8m33-mcxn94x-frdm/build.project
index e0a73f4e..927d1e4c 100644
--- a/_projects/armv8m33-mcxn94x-frdm/build.project
+++ b/_projects/armv8m33-mcxn94x-frdm/build.project
@@ -11,6 +11,9 @@
 : "${WATCHDOG:=0}"
 export WATCHDOG
 
+# Use CPU1
+export MCX_USE_CPU1=y
+
 b_image_project () {
 	b_log "The images have been built for the ${TARGET} platform"
 }