diff --git a/x-pack/plugins/transform/public/app/sections/create_transform/components/step_define/common/filter_agg/components/filter_term_form.tsx b/x-pack/plugins/transform/public/app/sections/create_transform/components/step_define/common/filter_agg/components/filter_term_form.tsx
index da2b5824a266e..358bb9dcafa96 100644
--- a/x-pack/plugins/transform/public/app/sections/create_transform/components/step_define/common/filter_agg/components/filter_term_form.tsx
+++ b/x-pack/plugins/transform/public/app/sections/create_transform/components/step_define/common/filter_agg/components/filter_term_form.tsx
@@ -81,7 +81,7 @@ export const FilterTermForm: FilterAggConfigTerm['aggTypeConfig']['FilterAggForm
       }
 
       setOptions(
-        response.aggregations.field_values.buckets.map((value) => ({ label: value.key_as_string }))
+        response.aggregations.field_values.buckets.map((value) => ({ label: value.key + '' }))
       );
     }, 600),
     [selectedField]