diff --git a/sdbusplus.hpp b/sdbusplus.hpp
index 133443f..fb6c51c 100644
--- a/sdbusplus.hpp
+++ b/sdbusplus.hpp
@@ -19,6 +19,10 @@
 namespace errors = sdbusplus::xyz::openbmc_project::Common::Error;
 } // namespace detail
 
+/** @brief Alias for PropertiesChanged signal callbacks. */
+template <typename ...T>
+using Properties = std::map<std::string, sdbusplus::message::variant<T...>>;
+
 /** @class SDBusPlus
  *  @brief DBus access delegate implementation for sdbusplus.
  */