diff --git a/src/interfaces/metric.hpp b/src/interfaces/metric.hpp
index 57a2b68..4e2fae3 100644
--- a/src/interfaces/metric.hpp
+++ b/src/interfaces/metric.hpp
@@ -19,6 +19,7 @@
     virtual void deinitialize() = 0;
     virtual std::vector<MetricValue> getReadings() const = 0;
     virtual LabeledMetricParameters dumpConfiguration() const = 0;
+    virtual uint64_t sensorCount() const = 0;
 };
 
 } // namespace interfaces
diff --git a/src/interfaces/report_factory.hpp b/src/interfaces/report_factory.hpp
index 970dd01..36fc589 100644
--- a/src/interfaces/report_factory.hpp
+++ b/src/interfaces/report_factory.hpp
@@ -26,7 +26,8 @@
     virtual std::unique_ptr<interfaces::Report>
         make(const std::string& name, const std::string& reportingType,
              bool emitsReadingsSignal, bool logToMetricReportsCollection,
-             Milliseconds period, ReportManager& reportManager,
+             Milliseconds period, uint64_t appendLimit,
+             const std::string& reportUpdates, ReportManager& reportManager,
              JsonStorage& reportStorage,
              std::vector<LabeledMetricParameters> labeledMetricParams,
              bool enabled) const = 0;