diff --git a/specification/graphrbac/data-plane/Microsoft.GraphRbac/stable/1.6/graphrbac.json b/specification/graphrbac/data-plane/Microsoft.GraphRbac/stable/1.6/graphrbac.json
index 1446c44d6531..fb3c107c9f79 100644
--- a/specification/graphrbac/data-plane/Microsoft.GraphRbac/stable/1.6/graphrbac.json
+++ b/specification/graphrbac/data-plane/Microsoft.GraphRbac/stable/1.6/graphrbac.json
@@ -1696,6 +1696,13 @@
             "type": "string",
             "description": "The filter to apply to the operation."
           },
+          {
+            "name": "$expand",
+            "in": "query",
+            "required": false,
+            "type": "string",
+            "description": "The expand value for the operation result."
+          },
           {
             "$ref": "#/parameters/ApiVersionParameter"
           },