diff --git a/doc/examples/plot_marked_watershed.py b/doc/examples/plot_marked_watershed.py
index 1db4f507..0be25007 100644
--- a/doc/examples/plot_marked_watershed.py
+++ b/doc/examples/plot_marked_watershed.py
@@ -22,7 +22,7 @@ from skimage import rank
 from skimage import data
 from scipy import ndimage
 
-# Generate an initial image with two overlapping circles
+# original data
 image = data.camera()
 
 # denoise image