diff --git a/core/views/ui/drilldown.py b/core/views/ui/drilldown.py
index bd7b0f6..34f69c6 100644
--- a/core/views/ui/drilldown.py
+++ b/core/views/ui/drilldown.py
@@ -108,9 +108,9 @@ def drilldown_search(request, return_context=False, template=None):
     else:
         template_name = template
     if request.user.is_anonymous:
-        sizes = settings.OPENSEARCH_MAIN_SIZES_ANON
+        sizes = settings.MANTICORE_MAIN_SIZES_ANON
     else:
-        sizes = settings.OPENSEARCH_MAIN_SIZES
+        sizes = settings.MANTICORE_MAIN_SIZES
 
     if request.GET:
         if not request.htmx: