diff --git a/src/lib/openapi/spec/feature-search-query-parameters.ts b/src/lib/openapi/spec/feature-search-query-parameters.ts
index c4cfc7512b..52ebf8237d 100644
--- a/src/lib/openapi/spec/feature-search-query-parameters.ts
+++ b/src/lib/openapi/spec/feature-search-query-parameters.ts
@@ -163,9 +163,10 @@ export const featureSearchQueryParameters = [
         schema: {
             type: 'string',
             example: 'IS:true',
+            pattern: '^IS:(true|false)$',
         },
         description:
-            'Whether to get results for archived feature flags or active feature flags. If `true`, Unleash will return only archived flags. If `false`, it will return only active flags.',
+            'Whether to get results for archived feature flags or active feature flags. If `IS:true`, Unleash will return only archived flags. If `IS:false`, it will return only active flags.',
         in: 'query',
     },
     {