diff --git a/ckanext/example_theme/v08_custom_helper_function/plugin.py b/ckanext/example_theme/v08_custom_helper_function/plugin.py
index 5b3707b23b6..3dd3008a941 100644
--- a/ckanext/example_theme/v08_custom_helper_function/plugin.py
+++ b/ckanext/example_theme/v08_custom_helper_function/plugin.py
@@ -8,7 +8,7 @@ def most_popular_groups():
     # Get a list of all the site's groups from CKAN, sorted by number of
     # datasets.
     groups = toolkit.get_action('group_list')(
-        data_dict={'sort': 'packages desc', 'all_fields': True})
+        data_dict={'sort': 'package_count desc', 'all_fields': True})
 
     # Truncate the list to the 10 most popular groups only.
     groups = groups[:10]