diff --git a/src/platform/packages/shared/kbn-storage-adapter/src/index_adapter/index.ts b/src/platform/packages/shared/kbn-storage-adapter/src/index_adapter/index.ts
index d0c3a11ee0bc0..28b4d4c76a2ea 100644
--- a/src/platform/packages/shared/kbn-storage-adapter/src/index_adapter/index.ts
+++ b/src/platform/packages/shared/kbn-storage-adapter/src/index_adapter/index.ts
@@ -242,8 +242,7 @@ export class StorageIndexAdapter<TStorageSettings extends IndexStorageSettings,
     if (simulateIndexTemplateResponse.template.mappings) {
       await this.esClient.indices.putMapping({
         index: name,
-        // @ts-expect-error elasticsearch@9.0.0 https://github.com/elastic/elasticsearch-js/issues/2584
-        body: simulateIndexTemplateResponse.template.mappings,
+        ...simulateIndexTemplateResponse.template.mappings,
       });
     }
   }