diff --git a/specification/cdn/resource-manager/Microsoft.Cdn/stable/2019-12-31/cdn.json b/specification/cdn/resource-manager/Microsoft.Cdn/stable/2019-12-31/cdn.json
index 3baa448d3b67..0972a7347200 100644
--- a/specification/cdn/resource-manager/Microsoft.Cdn/stable/2019-12-31/cdn.json
+++ b/specification/cdn/resource-manager/Microsoft.Cdn/stable/2019-12-31/cdn.json
@@ -3925,8 +3925,9 @@
           ]
         },
         "originGroup": {
-          "description": "Origin Group from where the content will be fetched from when CDN does not have it",
-          "type": "string"
+          "description": "A reference to the origin group from where the content will be fetched from when CDN does not have it",
+          "type": "object",
+          "$ref": "#/definitions/ResourceReference"
         }
       }
     },