diff --git a/graph/leveldb/iterator.go b/graph/leveldb/iterator.go
index 072543d..67640b1 100644
--- a/graph/leveldb/iterator.go
+++ b/graph/leveldb/iterator.go
@@ -199,7 +199,7 @@ func PositionOf(prefix []byte, d quad.Direction, qs *QuadStore) int {
 		case quad.Object:
 			return hashSize + 2
 		case quad.Label:
-			return hashSize + 2
+			return 3*hashSize + 2
 		}
 	}
 	if bytes.Equal(prefix, []byte("os")) {