diff --git a/ipmitool/include/ipmitool/ipmi_constants.h b/ipmitool/include/ipmitool/ipmi_constants.h
index ab503f5..23f291b 100644
--- a/ipmitool/include/ipmitool/ipmi_constants.h
+++ b/ipmitool/include/ipmitool/ipmi_constants.h
@@ -70,6 +70,7 @@
 #define IPMI_SESSION_AUTHTYPE_OEM       0x5
 #define IPMI_SESSION_AUTHTYPE_RMCP_PLUS 0x6
 
+#define IPMI_SESSION_PRIV_UNSPECIFIED   0x0
 #define IPMI_SESSION_PRIV_CALLBACK	0x1
 #define IPMI_SESSION_PRIV_USER		0x2
 #define IPMI_SESSION_PRIV_OPERATOR	0x3