@@ -323,7 +323,7 @@ func (a *Driver) Diff(id, parent string) (archive.Archive, error) {

 }

 func (a *Driver) applyDiff(id string, diff archive.ArchiveReader) error {

-	return chrootarchive.Untar(diff, path.Join(a.rootPath(), "diff", id), nil)

+	return chrootarchive.UntarUncompressed(diff, path.Join(a.rootPath(), "diff", id), nil)

 }

 // DiffSize calculates the changes between the specified id

@@ -77,6 +77,7 @@ type Driver interface {

 	// ApplyDiff extracts the changeset from the given diff into the

 	// layer with the specified id and parent, returning the size of the

 	// new layer in bytes.

+	// The archive.ArchiveReader must be an uncompressed stream.

 	ApplyDiff(id, parent string, diff archive.ArchiveReader) (size int64, err error)

 	// DiffSize calculates the changes between the specified id

 	// and its parent and returns the size in bytes of the changes

@@ -121,7 +121,7 @@ func (gdw *naiveDiffDriver) ApplyDiff(id, parent string, diff archive.ArchiveRea

 	start := time.Now().UTC()

 	logrus.Debugf("Start untar layer")

-	if size, err = chrootarchive.ApplyLayer(layerFs, diff); err != nil {

+	if size, err = chrootarchive.ApplyUncompressedLayer(layerFs, diff); err != nil {

 		return

 	}

 	logrus.Debugf("Untar time: %vs", time.Now().UTC().Sub(start).Seconds())

@@ -411,7 +411,7 @@ func (d *Driver) ApplyDiff(id string, parent string, diff archive.ArchiveReader)

 		return 0, err

 	}

-	if size, err = chrootarchive.ApplyLayer(tmpRootDir, diff); err != nil {

+	if size, err = chrootarchive.ApplyUncompressedLayer(tmpRootDir, diff); err != nil {

 		return 0, err

 	}