diff --git a/graph/leveldb/all_iterator.go b/graph/leveldb/all_iterator.go
index 3a118f9..2940a0d 100644
--- a/graph/leveldb/all_iterator.go
+++ b/graph/leveldb/all_iterator.go
@@ -119,6 +119,10 @@ func (it *AllIterator) Next() bool {
 	return true
 }
 
+func (it *AllIterator) Err() error {
+	return it.iter.Error()
+}
+
 func (it *AllIterator) ResultTree() *graph.ResultTree {
 	return graph.NewResultTree(it.Result())
 }
diff --git a/graph/leveldb/iterator.go b/graph/leveldb/iterator.go
index dcc4aeb..3a77188 100644
--- a/graph/leveldb/iterator.go
+++ b/graph/leveldb/iterator.go
@@ -154,6 +154,10 @@ func (it *Iterator) Next() bool {
 	return false
 }
 
+func (it *Iterator) Err() error {
+	return it.iter.Error()
+}
+
 func (it *Iterator) ResultTree() *graph.ResultTree {
 	return graph.NewResultTree(it.Result())
 }