| Index: src/hydrogen.cc | 
| diff --git a/src/hydrogen.cc b/src/hydrogen.cc | 
| index 0b189d5e3fe890fafc4129c7ae1b4137e1eea7ad..986f4ee16e90ecd2e1156834fe7225878a539e2b 100644 | 
| --- a/src/hydrogen.cc | 
| +++ b/src/hydrogen.cc | 
| @@ -6714,7 +6714,7 @@ HValue* HOptimizedGraphBuilder::HandleKeyedElementAccess( | 
|  | 
| if (monomorphic) { | 
| Handle<Map> map = types->first(); | 
| -    if (map->has_slow_elements_kind()) { | 
| +    if (map->has_slow_elements_kind() || !map->IsJSObjectMap()) { | 
| instr = is_store ? BuildStoreKeyedGeneric(obj, key, val) | 
| : BuildLoadKeyedGeneric(obj, key); | 
| AddInstruction(instr); | 
|  |