diff --git a/src/plugins/data/server/index.ts b/src/plugins/data/server/index.ts
index 19692b0991ac6..02e69c610af43 100644
--- a/src/plugins/data/server/index.ts
+++ b/src/plugins/data/server/index.ts
@@ -106,7 +106,7 @@ export const indexPatterns = {
 export {
   IndexPatternsFetcher,
   FieldDescriptor as IndexPatternFieldDescriptor,
-  shouldReadFieldFromDocValues,
+  shouldReadFieldFromDocValues, // used only in logstash_fields fixture
 } from './index_patterns';
 
 export {