diff --git a/libs/math/include/psemek/math/concat.hpp b/libs/math/include/psemek/math/concat.hpp
index 9da409fc..db871c53 100644
--- a/libs/math/include/psemek/math/concat.hpp
+++ b/libs/math/include/psemek/math/concat.hpp
@@ -1,18 +1,18 @@
 #pragma once
 
-#include <psemek/math/vector.hpp>
+#include <cstddef>
 
 namespace psemek::math
 {
 
-	template <typename T, std::size_t ... Ns>
-	auto concat(vector<T, Ns> const & ... vs)
+	template <template <typename, std::size_t> typename V, typename T, std::size_t ... Ns>
+	auto concat(V<T, Ns> const & ... vs)
 	{
-		vector<T, (Ns + ...)> result;
+		V<T, (Ns + ...)> result;
 
 		std::size_t i = 0;
 
-		auto apply = [&]<std::size_t N>(vector<T, N> const & v)
+		auto apply = [&]<std::size_t N>(V<T, N> const & v)
 		{
 			for (std::size_t j = 0; j < N;)
 				result[i++] = v[j++];