diff --git a/src/arithmetic_container.py b/src/arithmetic_container.py
index debe81e284905740eadc70c59b8afc3d1f80535f..e4bd10795409d211e4f841345e80fd4af61d27cf 100644
--- a/src/arithmetic_container.py
+++ b/src/arithmetic_container.py
@@ -5,7 +5,7 @@ import operator
 
 
 
-class PythonArithmeticList(list):
+class ArithmeticList(list):
     """A list with elementwise arithmetic operations."""
 
     def assert_same_length(self, other):
@@ -162,15 +162,6 @@ class PythonArithmeticList(list):
 
 
 
-# use fast native implementation, if available
-try:
-    from pylinear.array import ArithmeticList
-except ImportError:
-    ArithmeticList = PythonArithmeticList
-
-
-
-
 def join_fields(*fields):
     result = ArithmeticList()
     for f in fields: