diff --git a/conf/machine/j721s2-evm.conf b/conf/machine/j721s2-evm.conf
index 7fe1fb0e..6377c459 100644
--- a/conf/machine/j721s2-evm.conf
+++ b/conf/machine/j721s2-evm.conf
@@ -9,6 +9,7 @@ MACHINE_FEATURES += "gpu"
 SERIAL_CONSOLES = "115200;ttyS2"
 SERIAL_CONSOLES_CHECK = "${SERIAL_CONSOLES}"
 TFA_K3_USART = "0x8"
+OPTEEMACHINE = "k3-j784s4"
 OPTEE_K3_USART = "0x8"
 
 KERNEL_DEVICETREE = " \