diff --git a/packages/loaders/json-schema/src/directives.ts b/packages/loaders/json-schema/src/directives.ts
index d9487424f7c16..b9d334a4481b8 100644
--- a/packages/loaders/json-schema/src/directives.ts
+++ b/packages/loaders/json-schema/src/directives.ts
@@ -144,10 +144,6 @@ export function processResolveRootFieldAnnotations(field: GraphQLField<any, any>
       return actualFieldObj;
     };
   }
-  field.extensions = field.extensions || {};
-  Object.defineProperty(field.extensions, 'propertyName', {
-    value: propertyName,
-  });
 }
 
 export const RegExpDirective = new GraphQLDirective({