diff --git a/const.hpp b/const.hpp
index e986425..13d61af 100644
--- a/const.hpp
+++ b/const.hpp
@@ -44,8 +44,9 @@
 constexpr uint8_t KW_VAL_PAIR_START_TAG = 0x84;
 constexpr uint8_t RECORD_END_TAG = 0x78;
 
-const std::string service = "xyz.openbmc_project.Inventory.Manager";
-const std::string VPD_OBJ_PATH_PREFIX = "/xyz/openbmc_project/inventory";
+static constexpr auto service = "xyz.openbmc_project.Inventory.Manager";
+static constexpr auto VPD_OBJ_PATH_PREFIX = "/xyz/openbmc_project/inventory";
+static constexpr auto COM_INTERFACE_PREFIX = "com.ibm.ipzvpd";
 
 namespace lengths
 {