diff --git a/app/controllers/events_controller.rb b/app/controllers/events_controller.rb
index d3832be7d..9c72c0f4e 100644
--- a/app/controllers/events_controller.rb
+++ b/app/controllers/events_controller.rb
@@ -183,11 +183,11 @@ def index
         end
       occurred =
         if total.positive?
-          facet_by_source(response.response.aggregations.occurred.buckets)
+          facet_by_year(response.response.aggregations.occurred.buckets)
         end
       prefixes =
         if total.positive?
-          facet_by_source(response.response.aggregations.prefixes.buckets)
+          facet_by_key(response.response.aggregations.prefixes.buckets)
         end
       citation_types =
         if total.positive?