diff --git a/examples/style_sheets/style_sheets_reference.py b/examples/style_sheets/style_sheets_reference.py
index 657c73aadb10..a7be6819aab7 100644
--- a/examples/style_sheets/style_sheets_reference.py
+++ b/examples/style_sheets/style_sheets_reference.py
@@ -62,7 +62,8 @@ def plot_colored_circles(ax, prng, nb_samples=15):
the color cycle, because different styles may have different numbers
of colors.
"""
- for sty_dict, j in zip(plt.rcParams['axes.prop_cycle'], range(nb_samples)):
+ for sty_dict, j in zip(plt.rcParams['axes.prop_cycle'](),
+ range(nb_samples)):
ax.add_patch(plt.Circle(prng.normal(scale=3, size=2),
radius=1.0, color=sty_dict['color']))
# Force the limits to be the same across the styles (because different
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