diff --git a/ofagent/protos/Makefile b/ofagent/protos/Makefile
index 157052d..2d9c069 100644
--- a/ofagent/protos/Makefile
+++ b/ofagent/protos/Makefile
@@ -33,5 +33,5 @@
 build: copyfiles
 
 copyfiles:
-	rsync -av --include '*/' --include '*.py' --exclude='*' $(SOURCE_PROTO_DIR)/ $(TARGET_PROTO_DIR)
+	rsync -av --include '*/' --exclude='third_party/__init__.py' --include '*.py' --exclude='*' $(SOURCE_PROTO_DIR)/ $(TARGET_PROTO_DIR)
 
diff --git a/ofagent/protos/third_party/__init__.py b/ofagent/protos/third_party/__init__.py
new file mode 100644
index 0000000..6dab4e7
--- /dev/null
+++ b/ofagent/protos/third_party/__init__.py
@@ -0,0 +1,50 @@
+#
+# Copyright 2016 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+"""
+This helps loading http_pb2 and annotations_pb2.
+Without this, the Python importer will not be able to process the lines:
+from google.api import http_pb2 or
+from google.api import annotations_pb2
+(Without importing these, the protobuf loader will not recognize http options
+in the protobuf definitions.)
+"""
+
+from importlib import import_module
+import os
+import sys
+
+
+class GoogleApiImporter(object):
+
+    def find_module(self, full_name, path=None):
+        if full_name == 'google.api':
+            self.path = [os.path.dirname(__file__)]
+            return self
+
+    def load_module(self, name):
+        if name in sys.modules:
+            return sys.modules[name]
+        full_name = 'ofagent.protos.third_party.' + name
+        import_module(full_name)
+        module = sys.modules[full_name]
+        sys.modules[name] = module
+        return module
+
+
+sys.meta_path.append(GoogleApiImporter())
+from google.api import http_pb2, annotations_pb2
+_ = http_pb2, annotations_pb2