diff --git a/inc/hgl/math/Matrix.h b/inc/hgl/math/Matrix.h
index a8d734d..4e30684 100644
--- a/inc/hgl/math/Matrix.h
+++ b/inc/hgl/math/Matrix.h
@@ -12,6 +12,7 @@ namespace hgl
 {
     using Matrix3f=glm::mat3;
     using Matrix4f=glm::mat4;
+    using Matrix3x4f=glm::mat3x4;
 
     inline Matrix4f inverse(const Matrix4f &m)
     {