diff --git a/const.hpp b/const.hpp
index ef0793e..cf50452 100644
--- a/const.hpp
+++ b/const.hpp
@@ -88,6 +88,8 @@
 constexpr auto errIntfForEccCheckFail = "com.ibm.VPD.Error.EccCheckFailed";
 constexpr auto errIntfForJsonFailure = "com.ibm.VPD.Error.InvalidJson";
 constexpr auto errIntfForBusFailure = "com.ibm.VPD.Error.DbusFailure";
+constexpr auto errIntfForInvalidSystemType =
+    "com.ibm.VPD.Error.UnknownSytemType";
 constexpr auto motherBoardInterface =
     "xyz.openbmc_project.Inventory.Item.Board.Motherboard";
 constexpr auto systemVpdFilePath = "/sys/bus/i2c/drivers/at24/8-0050/eeprom";