diff --git a/src/openapi/schemas/tweet.yaml b/src/openapi/schemas/tweet.yaml
index 9a4d865..534a468 100644
--- a/src/openapi/schemas/tweet.yaml
+++ b/src/openapi/schemas/tweet.yaml
@@ -667,7 +667,7 @@ components:
           type: string
         visualStyle:
           type: string
-          enum: [Default]
+          enum: [Default, Tentative]
         iconType:
           type: string
           enum: [BirdwatchV1Icon]