diff --git a/examples/show_volumes.py b/examples/show_volumes.py
index fd70e2989..3a0dcdda5 100644
--- a/examples/show_volumes.py
+++ b/examples/show_volumes.py
@@ -54,4 +54,5 @@
     hexa.vertex_data["arange"] = np.arange(len(v))
     # set vertex_data to plot
     hexa.show_options["data_name"] = "arange"
+    hexa.show_options["scalarbar3d"] = True
     hexa.show()