diff --git a/nitransforms/linear.py b/nitransforms/linear.py
index c7eb608a..af14f396 100644
--- a/nitransforms/linear.py
+++ b/nitransforms/linear.py
@@ -147,7 +147,7 @@ def matrix(self):
     def ndim(self):
         """Access the internal representation of this affine."""
         return self._matrix.ndim + 1
-    
+
     def map(self, x, inverse=False):
         r"""
         Apply :math:`y = f(x)`.