diff --git a/cpp/src/msgpack/type/fixint.hpp b/cpp/src/msgpack/type/fixint.hpp
index da584159..ebe2696f 100644
--- a/cpp/src/msgpack/type/fixint.hpp
+++ b/cpp/src/msgpack/type/fixint.hpp
@@ -19,6 +19,7 @@
 #define MSGPACK_TYPE_FIXINT_HPP__
 
 #include "msgpack/object.hpp"
+#include "msgpack/type/int.hpp"
 
 namespace msgpack {
 
@@ -29,10 +30,13 @@ template <typename T>
 struct fix_int {
 	fix_int() : value(0) { }
 	fix_int(T value) : value(value) { }
+
 	operator T() const { return value; }
+
 	T get() const { return value; }
+
 private:
-	const T value;
+	T value;
 };
 
 
@@ -50,6 +54,32 @@ typedef fix_int<int64_t> fix_int64;
 }  // namespace type
 
 
+inline type::fix_int8& operator>> (object o, type::fix_int8& v)
+	{ v = type::detail::convert_integer<int8_t>(o); return v; }
+
+inline type::fix_int16& operator>> (object o, type::fix_int16& v)
+	{ v = type::detail::convert_integer<int16_t>(o); return v; }
+
+inline type::fix_int32& operator>> (object o, type::fix_int32& v)
+	{ v = type::detail::convert_integer<int32_t>(o); return v; }
+
+inline type::fix_int64& operator>> (object o, type::fix_int64& v)
+	{ v = type::detail::convert_integer<int64_t>(o); return v; }
+
+
+inline type::fix_uint8& operator>> (object o, type::fix_uint8& v)
+	{ v = type::detail::convert_integer<uint8_t>(o); return v; }
+
+inline type::fix_uint16& operator>> (object o, type::fix_uint16& v)
+	{ v = type::detail::convert_integer<uint16_t>(o); return v; }
+
+inline type::fix_uint32& operator>> (object o, type::fix_uint32& v)
+	{ v = type::detail::convert_integer<uint32_t>(o); return v; }
+
+inline type::fix_uint64& operator>> (object o, type::fix_uint64& v)
+	{ v = type::detail::convert_integer<uint64_t>(o); return v; }
+
+
 template <typename Stream>
 inline packer<Stream>& operator<< (packer<Stream>& o, const type::fix_int8& v)
 	{ o.pack_fix_int8(v); return o; }
@@ -66,6 +96,7 @@ template <typename Stream>
 inline packer<Stream>& operator<< (packer<Stream>& o, const type::fix_int64& v)
 	{ o.pack_fix_int64(v); return o; }
 
+
 template <typename Stream>
 inline packer<Stream>& operator<< (packer<Stream>& o, const type::fix_uint8& v)
 	{ o.pack_fix_uint8(v); return o; }
@@ -83,6 +114,58 @@ inline packer<Stream>& operator<< (packer<Stream>& o, const type::fix_uint64& v)
 	{ o.pack_fix_uint64(v); return o; }
 
 
+inline void operator<< (object& o, type::fix_int8 v)
+	{ v.get() < 0 ? o.type = type::NEGATIVE_INTEGER, o.via.i64 = v.get() : o.type = type::POSITIVE_INTEGER, o.via.u64 = v.get(); }
+
+inline void operator<< (object& o, type::fix_int16 v)
+	{ v.get() < 0 ? o.type = type::NEGATIVE_INTEGER, o.via.i64 = v.get() : o.type = type::POSITIVE_INTEGER, o.via.u64 = v.get(); }
+
+inline void operator<< (object& o, type::fix_int32 v)
+	{ v.get() < 0 ? o.type = type::NEGATIVE_INTEGER, o.via.i64 = v.get() : o.type = type::POSITIVE_INTEGER, o.via.u64 = v.get(); }
+
+inline void operator<< (object& o, type::fix_int64 v)
+	{ v.get() < 0 ? o.type = type::NEGATIVE_INTEGER, o.via.i64 = v.get() : o.type = type::POSITIVE_INTEGER, o.via.u64 = v.get(); }
+
+
+inline void operator<< (object& o, type::fix_uint8 v)
+	{ o.type = type::POSITIVE_INTEGER, o.via.u64 = v.get(); }
+
+inline void operator<< (object& o, type::fix_uint16 v)
+	{ o.type = type::POSITIVE_INTEGER, o.via.u64 = v.get(); }
+
+inline void operator<< (object& o, type::fix_uint32 v)
+	{ o.type = type::POSITIVE_INTEGER, o.via.u64 = v.get(); }
+
+inline void operator<< (object& o, type::fix_uint64 v)
+	{ o.type = type::POSITIVE_INTEGER, o.via.u64 = v.get(); }
+
+
+inline void operator<< (object::with_zone& o, type::fix_int8 v)
+	{ static_cast<object&>(o) << v; }
+
+inline void operator<< (object::with_zone& o, type::fix_int16 v)
+	{ static_cast<object&>(o) << v; }
+
+inline void operator<< (object::with_zone& o, type::fix_int32 v)
+	{ static_cast<object&>(o) << v; }
+
+inline void operator<< (object::with_zone& o, type::fix_int64 v)
+	{ static_cast<object&>(o) << v; }
+
+
+inline void operator<< (object::with_zone& o, type::fix_uint8 v)
+	{ static_cast<object&>(o) << v; }
+
+inline void operator<< (object::with_zone& o, type::fix_uint16 v)
+	{ static_cast<object&>(o) << v; }
+
+inline void operator<< (object::with_zone& o, type::fix_uint32 v)
+	{ static_cast<object&>(o) << v; }
+
+inline void operator<< (object::with_zone& o, type::fix_uint64 v)
+	{ static_cast<object&>(o) << v; }
+
+
 }  // namespace msgpack
 
 #endif /* msgpack/type/fixint.hpp */
diff --git a/cpp/test/fixint.cc b/cpp/test/fixint.cc
index 64a39acd..63288a1b 100644
--- a/cpp/test/fixint.cc
+++ b/cpp/test/fixint.cc
@@ -22,3 +22,34 @@ TEST(fixint, size)
 	check_size<msgpack::type::fix_uint64>(9);
 }
 
+
+template <typename T>
+void check_convert() {
+	T v1(-11);
+	msgpack::sbuffer sbuf;
+	msgpack::pack(sbuf, v1);
+
+	msgpack::unpacked msg;
+	msgpack::unpack(&msg, sbuf.data(), sbuf.size());
+
+	T v2;
+	msg.get().convert(&v2);
+
+	EXPECT_EQ(v1.get(), v2.get());
+
+	EXPECT_EQ(msg.get(), msgpack::object(T(v1.get())));
+}
+
+TEST(fixint, convert)
+{
+	check_convert<msgpack::type::fix_int8>();
+	check_convert<msgpack::type::fix_int16>();
+	check_convert<msgpack::type::fix_int32>();
+	check_convert<msgpack::type::fix_int64>();
+
+	check_convert<msgpack::type::fix_uint8>();
+	check_convert<msgpack::type::fix_uint16>();
+	check_convert<msgpack::type::fix_uint32>();
+	check_convert<msgpack::type::fix_uint64>();
+}
+