diff --git a/misc/acrn-config/scenario_config/vm_configurations_h.py b/misc/acrn-config/scenario_config/vm_configurations_h.py
index c9f60dc81..da430bcfe 100644
--- a/misc/acrn-config/scenario_config/vm_configurations_h.py
+++ b/misc/acrn-config/scenario_config/vm_configurations_h.py
@@ -114,6 +114,7 @@ def gen_sos_header(vm_info, config):
     print("", file=config)
     print("#define SOS_VM_BOOTARGS\t\t\tSOS_ROOTFS\t\\", file=config)
     print("\t\t\t\t\tSOS_CONSOLE\t\\", file=config)
+    print("\t\t\t\t\tSOS_IDLE\t\\", file=config)
     print("\t\t\t\t\tSOS_BOOTARGS_DIFF", file=config)