diff --git a/data/api/client-server/definitions/sso_login_flow.yaml b/data/api/client-server/definitions/sso_login_flow.yaml
index 2f395c3a..28d173a0 100644
--- a/data/api/client-server/definitions/sso_login_flow.yaml
+++ b/data/api/client-server/definitions/sso_login_flow.yaml
@@ -87,7 +87,7 @@ properties:
           example: "github"
       required: ['id', 'name']
   oauth_aware_preferred:
-    type: bool
+    type: boolean
     x-addedInMatrixVersion: "1.17"
     description: |
       Whether the `m.login.sso` flow is preferred over other flows for