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diff --git a/src/base_object-inl.h b/src/base_object-inl.h
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+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+#ifndef SRC_BASE_OBJECT_INL_H_
+#define SRC_BASE_OBJECT_INL_H_
+
+#if defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS
+
+#include "base_object.h"
+#include "env-inl.h"
+#include "util-inl.h"
+#include "v8.h"
+
+namespace node {
+
+inline BaseObject::BaseObject(Environment* env, v8::Local<v8::Object> handle)
+    : persistent_handle_(env->isolate(), handle),
+      env_(env) {
+  CHECK_EQ(false, handle.IsEmpty());
+  // The zero field holds a pointer to the handle. Immediately set it to
+  // nullptr in case it's accessed by the user before construction is complete.
+  if (handle->InternalFieldCount() > 0)
+    handle->SetAlignedPointerInInternalField(0, nullptr);
+}
+
+
+inline BaseObject::~BaseObject() {
+  CHECK(persistent_handle_.IsEmpty());
+}
+
+
+inline v8::Persistent<v8::Object>& BaseObject::persistent() {
+  return persistent_handle_;
+}
+
+
+inline v8::Local<v8::Object> BaseObject::object() {
+  return PersistentToLocal(env_->isolate(), persistent_handle_);
+}
+
+
+inline Environment* BaseObject::env() const {
+  return env_;
+}
+
+
+template <typename Type>
+inline void BaseObject::WeakCallback(
+    const v8::WeakCallbackInfo<Type>& data) {
+  Type* self = data.GetParameter();
+  self->persistent().Reset();
+  delete self;
+}
+
+
+template <typename Type>
+inline void BaseObject::MakeWeak(Type* ptr) {
+  v8::HandleScope scope(env_->isolate());
+  v8::Local<v8::Object> handle = object();
+  CHECK_GT(handle->InternalFieldCount(), 0);
+  Wrap(handle, ptr);
+  persistent_handle_.MarkIndependent();
+  persistent_handle_.SetWeak<Type>(ptr, WeakCallback<Type>,
+                                   v8::WeakCallbackType::kParameter);
+}
+
+
+inline void BaseObject::ClearWeak() {
+  persistent_handle_.ClearWeak();
+}
+
+}  // namespace node
+
+#endif  // defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS
+
+#endif  // SRC_BASE_OBJECT_INL_H_