diff --git a/bibliopixel/animation/matrix.py b/bibliopixel/animation/matrix.py
index <HASH>..<HASH> 100644
--- a/bibliopixel/animation/matrix.py
+++ b/bibliopixel/animation/matrix.py
@@ -4,7 +4,7 @@ from .. layout import Matrix
 
 class BaseMatrixAnim(BaseAnimation):
 
-    def __init__(self, layout, width=0, height=0, startX=0, startY=0):
+    def __init__(self, layout, width=0, height=0):
         super().__init__(layout)
         if not isinstance(layout, Matrix):  # pragma: no cover
             raise RuntimeError('Must use bibliopixel.layout.Matrix with ' +
@@ -12,6 +12,3 @@ class BaseMatrixAnim(BaseAnimation):
 
         self.width = width or layout.width
         self.height = height or layout.height
-
-        self.startX = startX
-        self.startY = startY
Remove startX and startY (fix #<I>)