diff --git a/libs/gfx/include/psemek/gfx/mesh.hpp b/libs/gfx/include/psemek/gfx/mesh.hpp
index 1de5052d..a539090c 100644
--- a/libs/gfx/include/psemek/gfx/mesh.hpp
+++ b/libs/gfx/include/psemek/gfx/mesh.hpp
@@ -563,10 +563,10 @@ namespace psemek::gfx
 			load(vertices.data(), vertices.size(), indices.data(), indices.size(), primitive_type, usage);
 		}
 
-		template <typename Vertex, std::size_t N, typename Index>
-		void load(geom::simplex<Vertex, N> const * simplices, std::size_t simplex_count, Index const * indices, std::size_t index_count, GLenum usage = gl::STREAM_DRAW)
+		template <typename Vertex, typename Index, std::size_t N>
+		void load(Vertex const * vertices, std::size_t vertex_count, geom::simplex<Index, N> const * simplices, std::size_t simplex_count, GLenum usage = gl::STREAM_DRAW)
 		{
-			static_assert(sizeof(geom::simplex<Vertex, N>) == (N + 1) * sizeof(Vertex));
+			static_assert(sizeof(geom::simplex<Index, N>) == (N + 1) * sizeof(Index));
 
 			GLenum primitive_type;
 
@@ -587,13 +587,13 @@ namespace psemek::gfx
 				static_assert("unknown primitive type");
 			}
 
-			load(reinterpret_cast<Vertex const *>(simplices), simplex_count * (N + 1), indices, index_count, primitive_type, usage);
+			load(vertices, vertex_count, reinterpret_cast<Index const *>(simplices), simplex_count * (N + 1), primitive_type, usage);
 		}
 
-		template <typename Vertex, std::size_t N, typename Index>
-		void load(std::vector<geom::simplex<Vertex, N>> const & simplices, std::vector<Index> const & indices, GLenum usage = gl::STREAM_DRAW)
+		template <typename Vertex, typename Index, std::size_t N>
+		void load(std::vector<Vertex> const & vertices, std::vector<geom::simplex<Index, N>> const & simplices, GLenum usage = gl::STREAM_DRAW)
 		{
-			load(simplices.data(), simplices.size(), indices.data(), indices.size(), usage);
+			load(vertices.data(), vertices.size(), simplices.data(), simplices.size(), usage);
 		}
 
 		void draw() const override