diff --git a/docs/static/spec/openapi/logstash-api.yaml b/docs/static/spec/openapi/logstash-api.yaml
index 21e8deea30b..f1b437ed74f 100644
--- a/docs/static/spec/openapi/logstash-api.yaml
+++ b/docs/static/spec/openapi/logstash-api.yaml
@@ -2364,7 +2364,8 @@ components:
                       type: object
                       properties:
                         goal:
-                          - enum:
+                          type: string
+                          enum:
                               - speed
                               - balanced
                               - size