diff --git a/utils.hpp b/utils.hpp
index 830a97f..6ac282d 100644
--- a/utils.hpp
+++ b/utils.hpp
@@ -131,6 +131,8 @@
 using PropertyValue =
     std::variant<bool, uint8_t, int16_t, uint16_t, int32_t, uint32_t, int64_t,
                  uint64_t, double, std::string>;
+using DbusProp = std::string;
+using DbusChangedProps = std::map<DbusProp, PropertyValue>;
 
 /**
  * @brief The interface for DBusHandler