diff --git a/.mailmap b/.mailmap
index 9af816f66c2d..78c4166d8555 100644
--- a/.mailmap
+++ b/.mailmap
@@ -329,6 +329,7 @@ Arihant Parsoya <parsoyaarihant@gmail.com>
 Arpan Chattopadhyay <f20180319@pilani.bits-pilani.ac.in> Arpan612 <f20180319@pilani.bits-pilani.ac.in>
 Arpit Goyal <agmps18@gmail.com>
 Arshdeep Singh <singh.arshdeep1999@gmail.com>
+Arthur Ryman <arthur.ryman@gmail.com>
 Arun Singh <arunsin997@gmail.com> Arun Singh <erarungwl2013@gmail.com>
 Arun sanganal <74652697+ArunSanganal@users.noreply.github.com>
 Ashish Kumar Gaurav <ashishkg0022@gmail.com>
diff --git a/sympy/matrices/__init__.py b/sympy/matrices/__init__.py
index c7cf351eba59..8e7b6a489161 100644
--- a/sympy/matrices/__init__.py
+++ b/sympy/matrices/__init__.py
@@ -12,7 +12,8 @@
 from .dense import MutableDenseMatrix
 from .matrices import DeferredVector, MatrixBase
 
-Matrix = MutableMatrix = MutableDenseMatrix
+MutableMatrix = MutableDenseMatrix
+Matrix = MutableMatrix
 
 from .sparse import MutableSparseMatrix
 from .sparsetools import banded