diff --git a/plugins/search-backend-node/api-report.md b/plugins/search-backend-node/api-report.md
index 7649bc5d0f..63273d7514 100644
--- a/plugins/search-backend-node/api-report.md
+++ b/plugins/search-backend-node/api-report.md
@@ -6,6 +6,7 @@
 /// <reference types="node" />
 
 import { Config } from '@backstage/config';
+import { CustomErrorBase } from '@backstage/errors';
 import { DocumentCollatorFactory } from '@backstage/plugin-search-common';
 import { DocumentDecoratorFactory } from '@backstage/plugin-search-common';
 import { DocumentTypeInfo } from '@backstage/plugin-search-common';
@@ -113,6 +114,9 @@ export class LunrSearchEngineIndexer extends BatchSearchEngineIndexer {
   initialize(): Promise<void>;
 }
 
+// @public
+export class MissingIndexError extends CustomErrorBase {}
+
 // @public
 export class NewlineDelimitedJsonCollatorFactory
   implements DocumentCollatorFactory