| Index: src/x64/code-stubs-x64.cc | 
| diff --git a/src/x64/code-stubs-x64.cc b/src/x64/code-stubs-x64.cc | 
| index 04c3e6837b05fe3853fc2888c8af71ce6feb4df7..4ff163572bbc1219b4d44dbce3820e6d1cdee3ba 100644 | 
| --- a/src/x64/code-stubs-x64.cc | 
| +++ b/src/x64/code-stubs-x64.cc | 
| @@ -62,6 +62,17 @@ void KeyedLoadFastElementStub::InitializeInterfaceDescriptor( | 
| } | 
|  | 
|  | 
| +void KeyedStoreFastElementStub::InitializeInterfaceDescriptor( | 
| +    Isolate* isolate, | 
| +    CodeStubInterfaceDescriptor* descriptor) { | 
| +  static Register registers[] = { rdx, rcx, rax }; | 
| +  descriptor->register_param_count_ = 3; | 
| +  descriptor->register_params_ = registers; | 
| +  descriptor->deoptimization_handler_ = | 
| +      FUNCTION_ADDR(KeyedStoreIC_MissFromStubFailure); | 
| +} | 
| + | 
| + | 
| void TransitionElementsKindStub::InitializeInterfaceDescriptor( | 
| Isolate* isolate, | 
| CodeStubInterfaceDescriptor* descriptor) { | 
|  |