diff --git a/audio/vorbis/decode.go b/audio/vorbis/decode.go
deleted file mode 100644
index e31d67aed..000000000
--- a/audio/vorbis/decode.go
+++ /dev/null
@@ -1,70 +0,0 @@
-// Copyright 2016 Hajime Hoshi
-//
-// 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.
-
-package vorbis
-
-import (
-	"errors"
-	"fmt"
-
-	"github.com/hajimehoshi/ebiten/audio"
-)
-
-// Stream is a decoded audio stream.
-type Stream struct {
-	decoded *decoded
-}
-
-// Read is implementation of io.Reader's Read.
-func (s *Stream) Read(p []byte) (int, error) {
-	return s.decoded.Read(p)
-}
-
-// Seek is implementation of io.Seeker's Seek.
-//
-// Note that Seek can take long since decoding is a relatively heavy task.
-func (s *Stream) Seek(offset int64, whence int) (int64, error) {
-	return s.decoded.Seek(offset, whence)
-}
-
-// Read is implementation of io.Closer's Close.
-func (s *Stream) Close() error {
-	return s.decoded.Close()
-}
-
-// Size returns the size of decoded stream in bytes.
-func (s *Stream) Size() int64 {
-	return s.decoded.Size()
-}
-
-// Decode decodes Ogg/Vorbis data to playable stream.
-//
-// The sample rate must be same as that of audio context.
-func Decode(context *audio.Context, src audio.ReadSeekCloser) (*Stream, error) {
-	decoded, channelNum, sampleRate, err := decode(src)
-	if err != nil {
-		return nil, err
-	}
-	// TODO: Remove this magic number
-	if channelNum != 2 {
-		return nil, errors.New("vorbis: number of channels must be 2")
-	}
-	if sampleRate != context.SampleRate() {
-		return nil, fmt.Errorf("vorbis: sample rate must be %d but %d", context.SampleRate(), sampleRate)
-	}
-	s := &Stream{
-		decoded: decoded,
-	}
-	return s, nil
-}
diff --git a/audio/vorbis/vorbis.go b/audio/vorbis/vorbis.go
index ac04feaaa..d0f7dc86e 100644
--- a/audio/vorbis/vorbis.go
+++ b/audio/vorbis/vorbis.go
@@ -16,6 +16,7 @@
 package vorbis
 
 import (
+	"fmt"
 	"io"
 	"runtime"
 
@@ -23,6 +24,33 @@ import (
 	"github.com/jfreymuth/oggvorbis"
 )
 
+// Stream is a decoded audio stream.
+type Stream struct {
+	decoded *decoded
+}
+
+// Read is implementation of io.Reader's Read.
+func (s *Stream) Read(p []byte) (int, error) {
+	return s.decoded.Read(p)
+}
+
+// Seek is implementation of io.Seeker's Seek.
+//
+// Note that Seek can take long since decoding is a relatively heavy task.
+func (s *Stream) Seek(offset int64, whence int) (int64, error) {
+	return s.decoded.Seek(offset, whence)
+}
+
+// Read is implementation of io.Closer's Close.
+func (s *Stream) Close() error {
+	return s.decoded.Close()
+}
+
+// Size returns the size of decoded stream in bytes.
+func (s *Stream) Size() int64 {
+	return s.decoded.Size()
+}
+
 type decoded struct {
 	data       []float32
 	totalBytes int
@@ -142,3 +170,24 @@ func decode(in audio.ReadSeekCloser) (*decoded, int, int, error) {
 	}
 	return d, r.Channels(), r.SampleRate(), nil
 }
+
+// Decode decodes Ogg/Vorbis data to playable stream.
+//
+// The sample rate must be same as that of audio context.
+func Decode(context *audio.Context, src audio.ReadSeekCloser) (*Stream, error) {
+	decoded, channelNum, sampleRate, err := decode(src)
+	if err != nil {
+		return nil, err
+	}
+	// TODO: Remove this magic number
+	if channelNum != 2 {
+		return nil, fmt.Errorf("vorbis: number of channels must be 2")
+	}
+	if sampleRate != context.SampleRate() {
+		return nil, fmt.Errorf("vorbis: sample rate must be %d but %d", context.SampleRate(), sampleRate)
+	}
+	s := &Stream{
+		decoded: decoded,
+	}
+	return s, nil
+}