diff --git a/doc/examples/plot_thresholding.py b/doc/examples/plot_thresholding.py
index 4def3435..df2a4b85 100644
--- a/doc/examples/plot_thresholding.py
+++ b/doc/examples/plot_thresholding.py
@@ -21,7 +21,6 @@ thresholding larger homogeneous regions.
 """
 
 import matplotlib.pyplot as plt
-import numpy as np
 
 from skimage.data import camera
 from skimage.filter import threshold_otsu, threshold_adaptive