diff --git a/misc/acrn-config/scenario_config/vm_configurations_h.py b/misc/acrn-config/scenario_config/vm_configurations_h.py
index a3c21e358..b5de6c328 100644
--- a/misc/acrn-config/scenario_config/vm_configurations_h.py
+++ b/misc/acrn-config/scenario_config/vm_configurations_h.py
@@ -118,6 +118,11 @@ def gen_sos_header(scenario_items, config):
 
     if 'SOS_VM' not in common.VM_TYPES.values():
         return
+
+    for vm_i,vm_type in common.VM_TYPES.items():
+        if vm_type == 'SOS_VM':
+            print("/* SOS_VM == VM{0} */".format(vm_i), 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)
diff --git a/misc/vm_configs/scenarios/hybrid/vm_configurations.h b/misc/vm_configs/scenarios/hybrid/vm_configurations.h
index d021753e7..706e32bac 100644
--- a/misc/vm_configs/scenarios/hybrid/vm_configurations.h
+++ b/misc/vm_configs/scenarios/hybrid/vm_configurations.h
@@ -29,6 +29,7 @@
 #define VM0_CONFIG_MEM_SIZE_HPA2        0x0UL
 #define VM0_CONFIG_PCI_DEV_NUM          1U
 
+/* SOS_VM == VM1 */
 #define SOS_VM_BOOTARGS			SOS_ROOTFS	\
 					SOS_CONSOLE	\
 					SOS_IDLE	\
diff --git a/misc/vm_configs/scenarios/hybrid_rt/vm_configurations.h b/misc/vm_configs/scenarios/hybrid_rt/vm_configurations.h
index c3edc6c9c..dd5a5789a 100644
--- a/misc/vm_configs/scenarios/hybrid_rt/vm_configurations.h
+++ b/misc/vm_configs/scenarios/hybrid_rt/vm_configurations.h
@@ -29,6 +29,7 @@
 #define VM0_CONFIG_MEM_SIZE_HPA2        0x0UL
 #define VM0_CONFIG_PCI_DEV_NUM          3U
 
+/* SOS_VM == VM1 */
 #define SOS_VM_BOOTARGS			SOS_ROOTFS	\
 					SOS_CONSOLE	\
 					SOS_IDLE	\
diff --git a/misc/vm_configs/scenarios/industry/vm_configurations.h b/misc/vm_configs/scenarios/industry/vm_configurations.h
index c42eace93..fe8fcd032 100644
--- a/misc/vm_configs/scenarios/industry/vm_configurations.h
+++ b/misc/vm_configs/scenarios/industry/vm_configurations.h
@@ -22,6 +22,7 @@
 #define DM_OWNED_GUEST_FLAG_MASK        (GUEST_FLAG_SECURE_WORLD_ENABLED | GUEST_FLAG_LAPIC_PASSTHROUGH | \
 						GUEST_FLAG_RT | GUEST_FLAG_IO_COMPLETION_POLLING)
 
+/* SOS_VM == VM0 */
 #define SOS_VM_BOOTARGS			SOS_ROOTFS	\
 					SOS_CONSOLE	\
 					SOS_IDLE	\