diff --git a/lib/services/search.service.ts b/lib/services/search.service.ts
index 2f027c25..93b90055 100644
--- a/lib/services/search.service.ts
+++ b/lib/services/search.service.ts
@@ -83,6 +83,7 @@ export class SearchService {
 
   indexTags(swagger:SwaggerSpec) {
     let tags = swagger.tags;
+    if (!tags) return;
     for (let tag of tags) {
       if (tag['x-traitTag']) continue;
       let id = `tag/${slugify(tag.name)}`;