diff --git a/libs/geom/include/psemek/geom/ray.hpp b/libs/geom/include/psemek/geom/ray.hpp
index 00e33e50..a20ce08e 100644
--- a/libs/geom/include/psemek/geom/ray.hpp
+++ b/libs/geom/include/psemek/geom/ray.hpp
@@ -65,4 +65,10 @@ namespace psemek::geom
 		return os;
 	}
 
+	template <typename T, std::size_t N>
+	ray<T, N> normalized(ray<T, N> r)
+	{
+		r.direction = normalized(r.direction);
+		return r;
+	}
 }