diff --git a/libs/geom/include/psemek/geom/intersection.hpp b/libs/geom/include/psemek/geom/intersection.hpp
index 22fbe183..68cdafe1 100644
--- a/libs/geom/include/psemek/geom/intersection.hpp
+++ b/libs/geom/include/psemek/geom/intersection.hpp
@@ -163,7 +163,7 @@ namespace psemek::geom
 	}
 
 	template <typename T, std::size_t N>
-	bool intersect(ray<T, N> const & r, simplex<T, N> const & s)
+	bool intersect(ray<T, N> const & r, simplex<point<T, N>, N - 1> const & s)
 	{
 		return static_cast<bool>(intersection(r, s));
 	}