diff --git a/src/ia32/code-stubs-ia32.cc b/src/ia32/code-stubs-ia32.cc
index 5affd6eaf0..d9a46cb9e5 100644
--- a/src/ia32/code-stubs-ia32.cc
+++ b/src/ia32/code-stubs-ia32.cc
@@ -48,7 +48,6 @@ void KeyedLoadFastElementStub::InitializeInterfaceDescriptor(
   static Register registers[] = { edx, ecx };
   descriptor->register_param_count_ = 2;
   descriptor->register_params_ = registers;
-  descriptor->stack_parameter_count_ = NULL;
   descriptor->deoptimization_handler_ =
       FUNCTION_ADDR(KeyedLoadIC_MissFromStubFailure);
 }
diff --git a/src/isolate.cc b/src/isolate.cc
index 556dde0718..61d2b2d89d 100644
--- a/src/isolate.cc
+++ b/src/isolate.cc
@@ -2016,8 +2016,6 @@ bool Isolate::Init(Deserializer* des) {
   date_cache_ = new DateCache();
   code_stub_interface_descriptors_ =
       new CodeStubInterfaceDescriptor[CodeStub::NUMBER_OF_IDS];
-  memset(code_stub_interface_descriptors_, 0,
-         kPointerSize * CodeStub::NUMBER_OF_IDS);
 
   // Enable logging before setting up the heap
   logger_->SetUp();
diff --git a/src/x64/code-stubs-x64.cc b/src/x64/code-stubs-x64.cc
index 095113c40d..5b7fc81a8d 100644
--- a/src/x64/code-stubs-x64.cc
+++ b/src/x64/code-stubs-x64.cc
@@ -45,7 +45,6 @@ void KeyedLoadFastElementStub::InitializeInterfaceDescriptor(
   static Register registers[] = { rdx, rax };
   descriptor->register_param_count_ = 2;
   descriptor->register_params_ = registers;
-  descriptor->stack_parameter_count_ = NULL;
   descriptor->deoptimization_handler_ =
       FUNCTION_ADDR(KeyedLoadIC_MissFromStubFailure);
 }