diff --git a/lib/erl/include/thrift_protocol_impl.hrl b/lib/erl/include/thrift_protocol_impl.hrl
new file mode 100644
index 0000000..7d8abae
--- /dev/null
+++ b/lib/erl/include/thrift_protocol_impl.hrl
@@ -0,0 +1,31 @@
+%%
+%% Licensed to the Apache Software Foundation (ASF) under one
+%% or more contributor license agreements. See the NOTICE file
+%% distributed with this work for additional information
+%% regarding copyright ownership. The ASF licenses this file
+%% to you 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.
+%%
+
+%% Signature specifications for protocol implementations.
+
+-ifndef(THRIFT_PROTOCOL_IMPL_INCLUDED).
+-define(THRIFT_PROTOCOL_IMPL_INCLUDED, true).
+
+-spec flush_transport(state()) -> ok.
+-spec close_transport(state()) -> ok.
+-spec write(state(), term()) -> ok | {error, _Reason}.
+-spec read(state(), term()) -> term().
+
+
+-endif.