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diff --git a/src/google/protobuf/compiler/objectivec/objectivec_message_field.cc b/src/google/protobuf/compiler/objectivec/objectivec_message_field.cc
new file mode 100644
index 00000000..9c4a4e44
--- /dev/null
+++ b/src/google/protobuf/compiler/objectivec/objectivec_message_field.cc
@@ -0,0 +1,90 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2008 Google Inc.  All rights reserved.
+// https://developers.google.com/protocol-buffers/
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#include <map>
+#include <string>
+
+#include <google/protobuf/compiler/objectivec/objectivec_message_field.h>
+#include <google/protobuf/compiler/objectivec/objectivec_helpers.h>
+#include <google/protobuf/io/printer.h>
+#include <google/protobuf/wire_format.h>
+#include <google/protobuf/stubs/strutil.h>
+
+namespace google {
+namespace protobuf {
+namespace compiler {
+namespace objectivec {
+
+namespace {
+
+void SetMessageVariables(const FieldDescriptor* descriptor,
+                         map<string, string>* variables) {
+  const string& message_type = ClassName(descriptor->message_type());
+  (*variables)["type"] = message_type;
+  (*variables)["containing_class"] = ClassName(descriptor->containing_type());
+  (*variables)["storage_type"] = message_type;
+  (*variables)["group_or_message"] =
+      (descriptor->type() == FieldDescriptor::TYPE_GROUP) ? "Group" : "Message";
+
+  (*variables)["typeSpecific_value"] = "GPBStringifySymbol(" + message_type + ")";
+}
+
+}  // namespace
+
+MessageFieldGenerator::MessageFieldGenerator(const FieldDescriptor* descriptor)
+    : ObjCObjFieldGenerator(descriptor) {
+  SetMessageVariables(descriptor, &variables_);
+}
+
+MessageFieldGenerator::~MessageFieldGenerator() {}
+
+bool MessageFieldGenerator::WantsHasProperty(void) const {
+  if (descriptor_->containing_oneof() != NULL) {
+    // If in a oneof, it uses the oneofcase instead of a has bit.
+    return false;
+  }
+  // In both proto2 & proto3, message fields have a has* property to tell
+  // when it is a non default value.
+  return true;
+}
+
+RepeatedMessageFieldGenerator::RepeatedMessageFieldGenerator(
+    const FieldDescriptor* descriptor)
+    : RepeatedFieldGenerator(descriptor) {
+  SetMessageVariables(descriptor, &variables_);
+  variables_["array_storage_type"] = "NSMutableArray";
+}
+
+RepeatedMessageFieldGenerator::~RepeatedMessageFieldGenerator() {}
+
+}  // namespace objectivec
+}  // namespace compiler
+}  // namespace protobuf
+}  // namespace google