diff --git a/syn/five/__init__.py b/syn/five/__init__.py
index <HASH>..<HASH> 100644
--- a/syn/five/__init__.py
+++ b/syn/five/__init__.py
@@ -4,3 +4,6 @@ from .string import *
 from .num import *
 from six import PY2, PY3
 from six.moves import xrange
+
+# For convenience, not compatibility
+SET = (set, frozenset)
Adding SET to syn.five