diff --git a/examples/images_contours_and_fields/pcolor_demo.py b/examples/images_contours_and_fields/pcolor_demo.py
index 251e2df10ea6..efaedc402f76 100644
--- a/examples/images_contours_and_fields/pcolor_demo.py
+++ b/examples/images_contours_and_fields/pcolor_demo.py
@@ -96,11 +96,11 @@
 
 fig, (ax0, ax1) = plt.subplots(2, 1)
 
-c = ax0.pcolor(X, Y, Z,
+c = ax0.pcolor(X, Y, Z, shading='auto',
                norm=LogNorm(vmin=Z.min(), vmax=Z.max()), cmap='PuBu_r')
 fig.colorbar(c, ax=ax0)
 
-c = ax1.pcolor(X, Y, Z, cmap='PuBu_r')
+c = ax1.pcolor(X, Y, Z, cmap='PuBu_r', shading='auto')
 fig.colorbar(c, ax=ax1)
 
 plt.show()