| Index: src/bootstrapper.cc | 
| diff --git a/src/bootstrapper.cc b/src/bootstrapper.cc | 
| index c6a1c32eadab97f63990b1ff1be3a9d1c967f717..a2b5bbe0712ae8e129b00f24f73ecfbbd97a0038 100644 | 
| --- a/src/bootstrapper.cc | 
| +++ b/src/bootstrapper.cc | 
| @@ -2449,6 +2449,7 @@ void Genesis::InstallJSProxyMaps() { | 
|  | 
| Handle<Map> proxy_map = | 
| factory()->NewMap(JS_PROXY_TYPE, JSProxy::kSize, FAST_ELEMENTS); | 
| +  proxy_map->set_dictionary_map(true); | 
| native_context()->set_proxy_map(*proxy_map); | 
|  | 
| Handle<Map> proxy_callable_map = Map::Copy(proxy_map, "callable Proxy"); | 
|  |