diff --git a/chassishandler.h b/chassishandler.h
index b6f7d93..e47b4a1 100644
--- a/chassishandler.h
+++ b/chassishandler.h
@@ -2,6 +2,7 @@
 #define __HOST_IPMI_CHASSIS_HANDLER_H__
 
 #include <stdint.h>
+#include <cstddef>
 
 // IPMI commands for Chassis net functions.
 enum ipmi_netfn_app_cmds
@@ -37,5 +38,16 @@
 	CMD_PULSE_DIAGNOSTIC_INTR  = 0x04,
 	CMD_SOFT_OFF_VIA_OVER_TEMP = 0x05,
 };
+enum class BootOptionParameter : size_t
+{
+    BOOT_FLAGS                    = 0x5,
+    OPAL_NETWORK_SETTINGS         = 0x61
+};
+
+enum class BootOptionResponseSize : size_t
+{
+    BOOT_FLAGS                    = 5,
+    OPAL_NETWORK_SETTINGS         = 26 
+};
 
 #endif