diff --git a/interleaver/leveldb.go b/interleaver/leveldb.go
index 36021e3..6474b5b 100644
--- a/interleaver/leveldb.go
+++ b/interleaver/leveldb.go
@@ -94,6 +94,7 @@ func (ldbp *LevelDBBlockProducer) Next(block *Block) (err error) {
 	}
 	block.Coord = ldbp.splitter(key)
 	block.Data = ldbp.iterator.Value()
+	ldbp.iterator.Next()
 	return
 }