diff --git a/src/restic/readerat.go b/src/restic/readerat.go
index 7d36b3396..6e6492ab5 100644
--- a/src/restic/readerat.go
+++ b/src/restic/readerat.go
@@ -9,11 +9,27 @@ type backendReaderAt struct {
 	h  Handle
 }
 
-func (brd backendReaderAt) ReadAt(p []byte, off int64) (n int, err error) {
-	return brd.be.Load(brd.h, p, off)
+func (brd backendReaderAt) ReadAt(p []byte, offset int64) (n int, err error) {
+	return ReadAt(brd.be, brd.h, offset, p)
 }
 
 // ReaderAt returns an io.ReaderAt for a file in the backend.
 func ReaderAt(be Backend, h Handle) io.ReaderAt {
 	return backendReaderAt{be: be, h: h}
 }
+
+// ReadAt reads from the backend handle h at the given position.
+func ReadAt(be Backend, h Handle, offset int64, p []byte) (n int, err error) {
+	rd, err := be.Get(h, len(p), offset)
+	if err != nil {
+		return 0, err
+	}
+
+	n, err = io.ReadFull(rd, p)
+	e := rd.Close()
+	if err == nil {
+		err = e
+	}
+
+	return n, err
+}