diff --git a/builder/builder.go b/builder/builder.go
index a99139896f..7f59efcc0f 100644
--- a/builder/builder.go
+++ b/builder/builder.go
@@ -26,6 +26,7 @@ import (
 	"github.com/docker/docker/pkg/parsers"
 	"github.com/docker/docker/pkg/symlink"
 	"github.com/docker/docker/pkg/system"
+	"github.com/docker/docker/pkg/tarsum"
 	"github.com/docker/docker/registry"
 	"github.com/docker/docker/runconfig"
 	"github.com/docker/docker/utils"
@@ -50,7 +51,7 @@ type buildFile struct {
 	config     *runconfig.Config
 
 	contextPath string
-	context     *utils.TarSum
+	context     *tarsum.TarSum
 
 	verbose      bool
 	utilizeCache bool
@@ -555,7 +556,7 @@ func (b *buildFile) runContextCommand(args string, allowRemote bool, allowDecomp
 		if err != nil {
 			return err
 		}
-		tarSum := &utils.TarSum{Reader: r, DisableCompression: true}
+		tarSum := &tarsum.TarSum{Reader: r, DisableCompression: true}
 		if _, err := io.Copy(ioutil.Discard, tarSum); err != nil {
 			return err
 		}
@@ -777,7 +778,7 @@ func (b *buildFile) Build(context io.Reader) (string, error) {
 		return "", err
 	}
 
-	b.context = &utils.TarSum{Reader: decompressedStream, DisableCompression: true}
+	b.context = &tarsum.TarSum{Reader: decompressedStream, DisableCompression: true}
 	if err := archive.Untar(b.context, tmpdirPath, nil); err != nil {
 		return "", err
 	}
diff --git a/utils/tarsum.go b/pkg/tarsum/tarsum.go
similarity index 96%
rename from utils/tarsum.go
rename to pkg/tarsum/tarsum.go
index afdf128ce6..5f562762b7 100644
--- a/utils/tarsum.go
+++ b/pkg/tarsum/tarsum.go
@@ -1,16 +1,18 @@
-package utils
+package tarsum
 
 import (
 	"bytes"
 	"compress/gzip"
 	"crypto/sha256"
 	"encoding/hex"
-	"github.com/docker/docker/vendor/src/code.google.com/p/go/src/pkg/archive/tar"
 	"hash"
 	"io"
 	"sort"
 	"strconv"
 	"strings"
+
+	"github.com/docker/docker/utils"
+	"github.com/docker/docker/vendor/src/code.google.com/p/go/src/pkg/archive/tar"
 )
 
 type TarSum struct {
@@ -168,11 +170,11 @@ func (ts *TarSum) Sum(extra []byte) string {
 		h.Write(extra)
 	}
 	for _, sum := range sums {
-		Debugf("-->%s<--", sum)
+		utils.Debugf("-->%s<--", sum)
 		h.Write([]byte(sum))
 	}
 	checksum := "tarsum+sha256:" + hex.EncodeToString(h.Sum(nil))
-	Debugf("checksum processed: %s", checksum)
+	utils.Debugf("checksum processed: %s", checksum)
 	return checksum
 }
 
diff --git a/utils/tarsum_test.go b/pkg/tarsum/tarsum_test.go
similarity index 99%
rename from utils/tarsum_test.go
rename to pkg/tarsum/tarsum_test.go
index 7904292ddf..f251f0993f 100644
--- a/utils/tarsum_test.go
+++ b/pkg/tarsum/tarsum_test.go
@@ -1,4 +1,4 @@
-package utils
+package tarsum
 
 import (
 	"bytes"
diff --git a/registry/registry.go b/registry/registry.go
index 0d4f2b3cc7..106a518141 100644
--- a/registry/registry.go
+++ b/registry/registry.go
@@ -26,6 +26,7 @@ import (
 	"github.com/docker/docker/dockerversion"
 	"github.com/docker/docker/pkg/httputils"
 	"github.com/docker/docker/pkg/parsers/kernel"
+	"github.com/docker/docker/pkg/tarsum"
 	"github.com/docker/docker/utils"
 )
 
@@ -638,7 +639,7 @@ func (r *Registry) PushImageLayerRegistry(imgID string, layer io.Reader, registr
 
 	utils.Debugf("[registry] Calling PUT %s", registry+"images/"+imgID+"/layer")
 
-	tarsumLayer := &utils.TarSum{Reader: layer}
+	tarsumLayer := &tarsum.TarSum{Reader: layer}
 	h := sha256.New()
 	h.Write(jsonRaw)
 	h.Write([]byte{'\n'})