diff --git a/libs/util/include/psemek/util/statistics.hpp b/libs/util/include/psemek/util/statistics.hpp
index d3e27bcd..014870e4 100644
--- a/libs/util/include/psemek/util/statistics.hpp
+++ b/libs/util/include/psemek/util/statistics.hpp
@@ -44,7 +44,7 @@ namespace psemek::util
 	template <typename T>
 	struct statistics_lite
 	{
-		void push(T const & value);
+		void push(T const & value, std::size_t count = 1);
 
 		std::size_t count() const { return count_; }
 		T mean() const;
@@ -64,11 +64,11 @@ namespace psemek::util
 	};
 
 	template <typename T>
-	void statistics_lite<T>::push(T const & value)
+	void statistics_lite<T>::push(T const & value, std::size_t count)
 	{
-		++count_;
-		sum_ += value;
-		sum_sqr_ += value * value;
+		count_ += count;
+		sum_ += value * static_cast<T>(count);
+		sum_sqr_ += value * value * static_cast<T>(count);
 		min_ = std::min(min_, value);
 		max_ = std::max(max_, value);
 	}