diff --git a/diagnostic_updater/include/diagnostic_updater/update_functions.h b/diagnostic_updater/include/diagnostic_updater/update_functions.h
index c4921086e..6ba7c1191 100644
--- a/diagnostic_updater/include/diagnostic_updater/update_functions.h
+++ b/diagnostic_updater/include/diagnostic_updater/update_functions.h
@@ -123,6 +123,17 @@ namespace diagnostic_updater
       clear();
     }
 
+      /**
+       * \brief Constructs a FrequencyStatus class with the given parameters.
+       */
+
+      FrequencyStatus(const FrequencyStatusParam &params, const std::string name) :
+        DiagnosticTask(name), params_(params),
+        times_(params_.window_size_), seq_nums_(params_.window_size_)
+    {
+      clear();
+    }
+
       /**
        * \brief Resets the statistics.
        */