diff --git a/contrib/hstore_plpython/expected/hstore_plpython.out b/contrib/hstore_plpython/expected/hstore_plpython.out
index e26c72d061..6252836841 100644
--- a/contrib/hstore_plpython/expected/hstore_plpython.out
+++ b/contrib/hstore_plpython/expected/hstore_plpython.out
@@ -6,7 +6,7 @@ LANGUAGE plpythonu
 TRANSFORM FOR TYPE hstore
 AS $$
 assert isinstance(val, dict)
-i = val.items()
+i = list(val.items())
 i.sort()
 plpy.info(i)
 return len(val)
@@ -25,7 +25,7 @@ LANGUAGE plpython2u
 TRANSFORM FOR TYPE hstore
 AS $$
 assert isinstance(val, dict)
-i = val.items()
+i = list(val.items())
 i.sort()
 plpy.info(i)
 return len(val)
diff --git a/contrib/hstore_plpython/sql/hstore_plpython.sql b/contrib/hstore_plpython/sql/hstore_plpython.sql
index e096df42fa..872d8c621c 100644
--- a/contrib/hstore_plpython/sql/hstore_plpython.sql
+++ b/contrib/hstore_plpython/sql/hstore_plpython.sql
@@ -8,7 +8,7 @@ LANGUAGE plpythonu
 TRANSFORM FOR TYPE hstore
 AS $$
 assert isinstance(val, dict)
-i = val.items()
+i = list(val.items())
 i.sort()
 plpy.info(i)
 return len(val)
@@ -23,7 +23,7 @@ LANGUAGE plpython2u
 TRANSFORM FOR TYPE hstore
 AS $$
 assert isinstance(val, dict)
-i = val.items()
+i = list(val.items())
 i.sort()
 plpy.info(i)
 return len(val)