diff --git a/scico/functional/_norm.py b/scico/functional/_norm.py
index 945ab8bbb..80fc15209 100644
--- a/scico/functional/_norm.py
+++ b/scico/functional/_norm.py
@@ -12,10 +12,10 @@
 from jax import jit, lax
 
 from scico import numpy as snp
+from scico.linop import FiniteDifference
 from scico.numpy import Array, BlockArray, count_nonzero
 from scico.numpy.linalg import norm
 from scico.numpy.util import no_nan_divide
-from scico.linop import FiniteDifference
 
 from ._functional import Functional