diff --git a/openapi/components/schemas/MIMEType.yaml b/openapi/components/schemas/MIMEType.yaml
index 0d39a25c..0a2f72bf 100644
--- a/openapi/components/schemas/MIMEType.yaml
+++ b/openapi/components/schemas/MIMEType.yaml
@@ -4,6 +4,7 @@ enum:
   - application/gzip
   - application/octet-stream
   - application/x-avatar
+  - application/x-prop
   - application/x-rsync-delta
   - application/x-rsync-signature
   - application/x-world