diff --git a/lib/xos-config/xosconfig/synchronizer-config-schema.yaml b/lib/xos-config/xosconfig/synchronizer-config-schema.yaml
index 640d61c..f41c7b2 100644
--- a/lib/xos-config/xosconfig/synchronizer-config-schema.yaml
+++ b/lib/xos-config/xosconfig/synchronizer-config-schema.yaml
@@ -32,6 +32,9 @@
       password:
         type: str
         required: True
+      kind:
+        type: str
+        required: False
   required_models:
     type: seq
     sequence: