diff --git a/generator_templates/usage_metric_definition/metric_definition.yml b/generator_templates/usage_metric_definition/metric_definition.yml
index 53ff84fc4ab8415c6e3f9c26027b5964c5867eb5..209ff628eb57b51030c1af10eadda21d5272740c 100644
--- a/generator_templates/usage_metric_definition/metric_definition.yml
+++ b/generator_templates/usage_metric_definition/metric_definition.yml
@@ -11,7 +11,7 @@ milestone: "<%= milestone %>"
 introduced_by_url:
 time_frame: <%= time_frame %>
 data_source:
-data_category: Operational
+data_category: Optional
 distribution:
 <%= distribution %>
 tier: