diff --git a/hwmon.hpp b/hwmon.hpp
index 4f4545c..c02ec52 100644
--- a/hwmon.hpp
+++ b/hwmon.hpp
@@ -14,12 +14,16 @@
 static constexpr auto ctarget = "target";
 static constexpr auto cenable = "enable";
 static constexpr auto cfault = "fault";
+static constexpr auto caverage = "average";
+static constexpr auto caverage_interval = "average_interval";
 
 static const std::string input = cinput;
 static const std::string label = clabel;
 static const std::string target = ctarget;
 static const std::string enable = cenable;
 static const std::string fault = cfault;
+static const std::string average = caverage;
+static const std::string average_interval = caverage_interval;
 } // namespace entry
 
 namespace type