diff --git a/docs/static/spec/openapi/logstash-api.yaml b/docs/static/spec/openapi/logstash-api.yaml
index 517a2080c53..82d96862e6b 100644
--- a/docs/static/spec/openapi/logstash-api.yaml
+++ b/docs/static/spec/openapi/logstash-api.yaml
@@ -2354,7 +2354,8 @@ components:
                       type: object
                       properties:
                         goal:
-                          - enum:
+                          type: string
+                          enum:
                               - speed
                               - balanced
                               - size