diff --git a/moses/metrics/SA_Score/sascorer.py b/moses/metrics/SA_Score/sascorer.py
index 723ccf1..8fce347 100644
--- a/moses/metrics/SA_Score/sascorer.py
+++ b/moses/metrics/SA_Score/sascorer.py
@@ -24,7 +24,7 @@
 
 from rdkit import Chem
 from rdkit.Chem import rdMolDescriptors
-from rdkit.six import iteritems
+from six import iteritems
 
 _fscores = None