diff --git a/ruby/makegem.sh b/ruby/makegem.sh
index bf30cd47..6a99cfe9 100755
--- a/ruby/makegem.sh
+++ b/ruby/makegem.sh
@@ -8,6 +8,7 @@ cp pack.h       ext/
 cp rbinit.c     ext/
 cp unpack.c     ext/
 cp unpack.h     ext/
+cp compat.h     ext/
 cp version.rb   ext/
 cp ../msgpack/pack_define.h     msgpack/
 cp ../msgpack/pack_template.h   msgpack/
diff --git a/ruby/test/test_pack_unpack.rb b/ruby/test/test_pack_unpack.rb
index f378c3c7..8bdb3628 100644
--- a/ruby/test/test_pack_unpack.rb
+++ b/ruby/test/test_pack_unpack.rb
@@ -227,8 +227,9 @@ class MessagePackTestPackUnpack < Test::Unit::TestCase
 			assert(fe.length > 0)
 			off += fe.length
 
-			pac.feed fe
-			pac.each {|obj|
+			#pac.feed fe
+			#pac.each {|obj|
+			pac.feed_each(fe) {|obj|
 				assert(!parsed)
 				assert_equal(obj, str)
 				parsed = true
@@ -245,8 +246,8 @@ class MessagePackTestPackUnpack < Test::Unit::TestCase
 		pac = MessagePack::Unpacker.new
 		parsed = 0
 		raw.split(//).each do |b|
-			pac.feed(b)
-			pac.each {|o|
+			#pac.feed(b)
+			pac.feed_each(b) {|o|
 				GC.start
 				assert_equal(obj, o)
 				parsed += 1
diff --git a/ruby/unpack.c b/ruby/unpack.c
index 2d10e75d..2a6614f7 100644
--- a/ruby/unpack.c
+++ b/ruby/unpack.c
@@ -420,9 +420,9 @@ static inline void feed_buffer(msgpack_unpack_t* mp, const char* ptr, size_t len
 {
 	struct unpack_buffer* buffer = &mp->user.buffer;
 
-	if(buffer->free < len) {
+	//if(buffer->free < len) {
 		reserve_buffer(mp, len);
-	}
+	//}
 	memcpy(buffer->ptr + buffer->size, ptr, len);
 	buffer->size += len;
 	buffer->free -= len;
@@ -528,6 +528,117 @@ static VALUE MessagePack_Unpacker_each(VALUE self)
 	return Qnil;
 }
 
+static VALUE feed_each_impl(VALUE args)
+{
+	VALUE self = ((VALUE*)args)[0];
+	VALUE data = ((VALUE*)args)[1];
+	size_t* pconsumed = (size_t*)((VALUE*)args)[2];
+
+	UNPACKER(self, mp);
+	int ret;
+	const char* ptr = RSTRING_PTR(data);
+	size_t len = RSTRING_LEN(data);
+
+	if(mp->user.buffer.size > 0) {
+		while(1) {
+			ret = template_execute_wrap_each(mp,
+					mp->user.buffer.ptr, mp->user.buffer.size,
+					&mp->user.offset);
+
+			if(ret < 0) {
+				rb_raise(eUnpackError, "parse error.");
+
+			} else if(ret > 0) {
+				VALUE data = template_data(mp);
+				template_init(mp);
+				rb_yield(data);
+
+			} else {
+				break;
+			}
+		}
+	}
+
+	if(len <= 0) {
+		return Qnil;
+	}
+
+	if(mp->user.buffer.size <= mp->user.offset) {
+		// wrap & execute & feed
+		while(1) {
+			ret = template_execute_wrap_each(mp,
+					ptr, len, pconsumed);
+
+			if(ret < 0) {
+				rb_raise(eUnpackError, "parse error.");
+
+			} else if(ret > 0) {
+				VALUE data = template_data(mp);
+				template_init(mp);
+				rb_yield(data);
+
+			} else {
+				break;
+			}
+		}
+
+	} else {
+		// feed & execute
+		feed_buffer(mp, ptr, len);
+		*pconsumed = len;
+
+		while(1) {
+			ret = template_execute_wrap_each(mp,
+					mp->user.buffer.ptr, mp->user.buffer.size,
+					&mp->user.offset);
+
+			if(ret < 0) {
+				rb_raise(eUnpackError, "parse error.");
+
+			} else if(ret > 0) {
+				VALUE data = template_data(mp);
+				template_init(mp);
+				rb_yield(data);
+
+			} else {
+				break;
+			}
+		}
+	}
+
+	return Qnil;
+}
+
+static VALUE feed_each_ensure(VALUE args) {
+	VALUE self = ((VALUE*)args)[0];
+	VALUE data = ((VALUE*)args)[1];
+	size_t* pconsumed = (size_t*)((VALUE*)args)[2];
+
+	UNPACKER(self, mp);
+	const char* ptr = RSTRING_PTR(data);
+	size_t len = RSTRING_LEN(data);
+
+	if(len > *pconsumed) {
+		feed_buffer(mp, ptr+*pconsumed, len-*pconsumed);
+	}
+
+	return Qnil;
+}
+
+static VALUE MessagePack_Unpacker_feed_each(VALUE self, VALUE data)
+{
+	size_t consumed = 0;
+	StringValue(data);
+
+	VALUE args[3];
+	args[0] = self;
+	args[1] = data;
+	args[2] = (VALUE)&consumed;
+
+	return rb_ensure(feed_each_impl, (VALUE)args,
+			feed_each_ensure, (VALUE)args);
+}
+
 
 static inline VALUE MessagePack_unpack_impl(VALUE self, VALUE data, unsigned long dlen)
 {
@@ -726,6 +837,7 @@ void Init_msgpack_unpack(VALUE mMessagePack)
 	rb_define_method(cUnpacker, "each", MessagePack_Unpacker_each, 0);
 	rb_define_method(cUnpacker, "stream", MessagePack_Unpacker_stream_get, 0);
 	rb_define_method(cUnpacker, "stream=", MessagePack_Unpacker_stream_set, 1);
+	rb_define_method(cUnpacker, "feed_each", MessagePack_Unpacker_feed_each, 1);
 
 	/* Unbuffered API */
 	rb_define_method(cUnpacker, "execute", MessagePack_Unpacker_execute, 2);
diff --git a/ruby/version.rb b/ruby/version.rb
index b1566203..4fca81ff 100644
--- a/ruby/version.rb
+++ b/ruby/version.rb
@@ -1,3 +1,3 @@
 module MessagePack
-	VERSION = "0.4.3"
+	VERSION = "0.4.4"
 end