diff --git a/libs/geom/include/psemek/geom/matrix.hpp b/libs/geom/include/psemek/geom/matrix.hpp
index 3875e773..be15fd75 100644
--- a/libs/geom/include/psemek/geom/matrix.hpp
+++ b/libs/geom/include/psemek/geom/matrix.hpp
@@ -5,6 +5,7 @@
 #include <psemek/geom/math.hpp>
 
 #include <iostream>
+#include <iomanip>
 #include <algorithm>
 
 namespace psemek::geom
@@ -375,4 +376,23 @@ namespace psemek::geom
 		return os;
 	}
 
+	template <typename T, std::size_t R, std::size_t C>
+	struct setw
+	{
+		matrix<T, R, C> const & m;
+		int w;
+	};
+
+	template <typename T, std::size_t R, std::size_t C>
+	std::ostream & operator << (std::ostream & os, setw<T, R, C> const & w)
+	{
+		for (std::size_t i = 0; i < R; ++i)
+		{
+			for (std::size_t j = 0; j < C; ++j)
+				os << std::fixed << std::right << std::setw(w.w) << w.m[i][j] << ' ';
+			os << '\n';
+		}
+		return os;
+	}
+
 }