diff --git a/cmd/restic/cmd_rebuild_index.go b/cmd/restic/cmd_rebuild_index.go
index 3582079b1..7a550354b 100644
--- a/cmd/restic/cmd_rebuild_index.go
+++ b/cmd/restic/cmd_rebuild_index.go
@@ -90,7 +90,7 @@ func (cmd CmdRebuildIndex) RebuildIndex() error {
 			}
 
 			blobsDone[b] = struct{}{}
-			combinedIndex.Store(packedBlob.Type, packedBlob.ID, packedBlob.PackID, packedBlob.Offset, packedBlob.Length)
+			combinedIndex.Store(packedBlob)
 		}
 
 		combinedIndex.AddToSupersedes(indexID)
@@ -162,7 +162,13 @@ func (cmd CmdRebuildIndex) RebuildIndex() error {
 
 		for _, blob := range up.Entries {
 			debug.Log("RebuildIndex.RebuildIndex", "pack %v: blob %v", packID.Str(), blob)
-			combinedIndex.Store(blob.Type, blob.ID, packID, blob.Offset, blob.Length)
+			combinedIndex.Store(repository.PackedBlob{
+				Type:   blob.Type,
+				ID:     blob.ID,
+				PackID: packID,
+				Offset: blob.Offset,
+				Length: blob.Length,
+			})
 		}
 
 		err = rd.Close()
diff --git a/repository/index.go b/repository/index.go
index e7df3168e..bb62f2ae9 100644
--- a/repository/index.go
+++ b/repository/index.go
@@ -40,12 +40,12 @@ func NewIndex() *Index {
 	}
 }
 
-func (idx *Index) store(t pack.BlobType, id backend.ID, pack backend.ID, offset, length uint) {
-	idx.pack[id] = indexEntry{
-		tpe:    t,
-		packID: pack,
-		offset: offset,
-		length: length,
+func (idx *Index) store(blob PackedBlob) {
+	idx.pack[blob.ID] = indexEntry{
+		tpe:    blob.Type,
+		packID: blob.PackID,
+		offset: blob.Offset,
+		length: blob.Length,
 	}
 }
 
@@ -96,7 +96,7 @@ var IndexFull = func(idx *Index) bool {
 
 // Store remembers the id and pack in the index. An existing entry will be
 // silently overwritten.
-func (idx *Index) Store(t pack.BlobType, id backend.ID, pack backend.ID, offset, length uint) {
+func (idx *Index) Store(blob PackedBlob) {
 	idx.m.Lock()
 	defer idx.m.Unlock()
 
@@ -104,10 +104,9 @@ func (idx *Index) Store(t pack.BlobType, id backend.ID, pack backend.ID, offset,
 		panic("store new item in finalized index")
 	}
 
-	debug.Log("Index.Store", "pack %v contains id %v (%v), offset %v, length %v",
-		pack.Str(), id.Str(), t, offset, length)
+	debug.Log("Index.Store", "%v", blob)
 
-	idx.store(t, id, pack, offset, length)
+	idx.store(blob)
 }
 
 // Lookup queries the index for the blob ID and returns a PackedBlob.
@@ -489,7 +488,13 @@ func DecodeIndex(rd io.Reader) (idx *Index, err error) {
 	idx = NewIndex()
 	for _, pack := range idxJSON.Packs {
 		for _, blob := range pack.Blobs {
-			idx.store(blob.Type, blob.ID, pack.ID, blob.Offset, blob.Length)
+			idx.store(PackedBlob{
+				Type:   blob.Type,
+				ID:     blob.ID,
+				Offset: blob.Offset,
+				Length: blob.Length,
+				PackID: pack.ID,
+			})
 		}
 	}
 	idx.supersedes = idxJSON.Supersedes
@@ -514,7 +519,13 @@ func DecodeOldIndex(rd io.Reader) (idx *Index, err error) {
 	idx = NewIndex()
 	for _, pack := range list {
 		for _, blob := range pack.Blobs {
-			idx.store(blob.Type, blob.ID, pack.ID, blob.Offset, blob.Length)
+			idx.store(PackedBlob{
+				Type:   blob.Type,
+				ID:     blob.ID,
+				PackID: pack.ID,
+				Offset: blob.Offset,
+				Length: blob.Length,
+			})
 		}
 	}
 
diff --git a/repository/index_test.go b/repository/index_test.go
index d403ed8ad..db4d79345 100644
--- a/repository/index_test.go
+++ b/repository/index_test.go
@@ -41,7 +41,13 @@ func TestIndexSerialize(t *testing.T) {
 		for j := 0; j < 20; j++ {
 			id := randomID()
 			length := uint(i*100 + j)
-			idx.Store(pack.Data, id, packID, pos, length)
+			idx.Store(repository.PackedBlob{
+				Type:   pack.Data,
+				ID:     id,
+				PackID: packID,
+				Offset: pos,
+				Length: length,
+			})
 
 			tests = append(tests, testEntry{
 				id:     id,
@@ -95,7 +101,13 @@ func TestIndexSerialize(t *testing.T) {
 		for j := 0; j < 10; j++ {
 			id := randomID()
 			length := uint(i*100 + j)
-			idx.Store(pack.Data, id, packID, pos, length)
+			idx.Store(repository.PackedBlob{
+				Type:   pack.Data,
+				ID:     id,
+				PackID: packID,
+				Offset: pos,
+				Length: length,
+			})
 
 			newtests = append(newtests, testEntry{
 				id:     id,
@@ -154,7 +166,13 @@ func TestIndexSize(t *testing.T) {
 		for j := 0; j < blobs; j++ {
 			id := randomID()
 			length := uint(i*100 + j)
-			idx.Store(pack.Data, id, packID, pos, length)
+			idx.Store(repository.PackedBlob{
+				Type:   pack.Data,
+				ID:     id,
+				PackID: packID,
+				Offset: pos,
+				Length: length,
+			})
 
 			pos += length
 		}
@@ -361,7 +379,13 @@ func TestIndexPacks(t *testing.T) {
 
 	for i := 0; i < 20; i++ {
 		packID := randomID()
-		idx.Store(pack.Data, randomID(), packID, 0, 23)
+		idx.Store(repository.PackedBlob{
+			Type:   pack.Data,
+			ID:     randomID(),
+			PackID: packID,
+			Offset: 0,
+			Length: 23,
+		})
 
 		packs.Insert(packID)
 	}
diff --git a/repository/repository.go b/repository/repository.go
index 436212bcc..752ad6b7a 100644
--- a/repository/repository.go
+++ b/repository/repository.go
@@ -270,7 +270,13 @@ func (r *Repository) savePacker(p *pack.Packer) error {
 	// update blobs in the index
 	for _, b := range p.Blobs() {
 		debug.Log("Repo.savePacker", "  updating blob %v to pack %v", b.ID.Str(), sid.Str())
-		r.idx.Current().Store(b.Type, b.ID, sid, b.Offset, uint(b.Length))
+		r.idx.Current().Store(PackedBlob{
+			Type:   b.Type,
+			ID:     b.ID,
+			PackID: sid,
+			Offset: b.Offset,
+			Length: uint(b.Length),
+		})
 		r.idx.RemoveFromInFlight(b.ID)
 	}