diff --git a/data/api/client-server/rooms.yaml b/data/api/client-server/rooms.yaml
index 9d456d32..ad343224 100644
--- a/data/api/client-server/rooms.yaml
+++ b/data/api/client-server/rooms.yaml
@@ -128,7 +128,7 @@ paths:
               schema:
                 oneOf:
                   - type: object
-                  - $ref: "../../event-schemas/core-event-schema/state_event.yaml
+                  - $ref: "../../event-schemas/core-event-schema/state_event.yaml"
               examples:
                 response:
                   value: {