diff --git a/doc/examples/plot_pyramid.py b/doc/examples/plot_pyramid.py
index 999435d5..60067549 100644
--- a/doc/examples/plot_pyramid.py
+++ b/doc/examples/plot_pyramid.py
@@ -13,7 +13,6 @@ import numpy as np
 import matplotlib.pyplot as plt
 
 from skimage import data
-from skimage import img_as_float
 from skimage.transform import build_gaussian_pyramid