diff --git a/src/cdtools/tools/propagators/propagators.py b/src/cdtools/tools/propagators/propagators.py
index 25c6769..0f8ffa4 100644
--- a/src/cdtools/tools/propagators/propagators.py
+++ b/src/cdtools/tools/propagators/propagators.py
@@ -6,7 +6,6 @@ ptychography model. Each function implements a different propagator.
 
 import torch as t
 from torch.nn.functional import grid_sample
-from scipy import fftpack
 import numpy as np
 from matplotlib import pyplot as plt