diff --git a/extensions/openpower-pels/dbus_types.hpp b/extensions/openpower-pels/dbus_types.hpp
index d63d56c..047ef77 100644
--- a/extensions/openpower-pels/dbus_types.hpp
+++ b/extensions/openpower-pels/dbus_types.hpp
@@ -8,11 +8,19 @@
 namespace openpower::pels
 {
 
+using BiosAttributes =
+    std::map<std::string,
+             std::tuple<std::string, bool, std::string, std::string,
+                        std::string, std::variant<int64_t, std::string>,
+                        std::variant<int64_t, std::string>,
+                        std::vector<std::tuple<
+                            std::string, std::variant<int64_t, std::string>>>>>;
+
 using DBusValue =
     std::variant<std::string, bool, std::vector<uint8_t>,
                  std::vector<std::string>,
                  std::vector<std::tuple<std::string, std::string, std::string>>,
-                 std::tuple<uint64_t, std::vector<uint8_t>>>;
+                 std::tuple<uint64_t, std::vector<uint8_t>>, BiosAttributes>;
 using DBusProperty = std::string;
 using DBusInterface = std::string;
 using DBusService = std::string;