diff --git a/doc/examples/features_detection/plot_gabors_from_astronaut.py b/doc/examples/features_detection/plot_gabors_from_astronaut.py
index a8cb50c2..7f718014 100644
--- a/doc/examples/features_detection/plot_gabors_from_astronaut.py
+++ b/doc/examples/features_detection/plot_gabors_from_astronaut.py
@@ -51,7 +51,7 @@ np.random.seed(42)
 patch_shape = 8, 8
 n_filters = 49
 
-astro = color.rgb2gray(data.astronaut())
+astro = np.ascontiguousarray(color.rgb2gray(data.astronaut()))
 
 # -- filterbank1 on original image
 patches1 = view_as_windows(astro, patch_shape)