diff --git a/doc/examples/plot_hough_transform.py b/doc/examples/plot_hough_transform.py
index 51a90c64..5416d662 100644
--- a/doc/examples/plot_hough_transform.py
+++ b/doc/examples/plot_hough_transform.py
@@ -109,7 +109,7 @@ plt.title('Input image')
 
 plt.subplot(132)
 plt.imshow(edges, cmap=plt.cm.gray)
-plt.title('Sobel edges')
+plt.title('Canny edges')
 
 plt.subplot(133)
 plt.imshow(edges * 0)