diff --git a/include/const_vector.hpp b/include/const_vector.hpp
index c2b9134..10c75e2 100644
--- a/include/const_vector.hpp
+++ b/include/const_vector.hpp
@@ -358,9 +358,8 @@ namespace cc {
 	template<typename T, std::size_t N>
 	constexpr void const_vector<T, N>::assign(std::initializer_list<value_type> values)
 	{
-		auto values_size = std::distance(values.begin(), values.end());
-		if (values_size > N) throw std::invalid_argument("Initializer list in assign has more elements than size" + std::to_string(values_size) + ">=" + std::to_string(N));
-		_size = values_size;
+		if (values.size() > N) throw std::invalid_argument("Initializer list in assign has more elements than size" + std::to_string(values_size) + ">=" + std::to_string(N));
+		_size = values.size();
 		std::copy(values.begin(), values.end(), _arr);
 	}