diff --git a/generic_utils.py b/generic_utils.py
index 7977681f..8bc502ef 100644
--- a/generic_utils.py
+++ b/generic_utils.py
@@ -35,6 +35,11 @@
 import functools
 import sys
 
+try:
+    collectionsAbc = collections.abc
+except AttributeError:
+    collectionsAbc = collections
+
 ################################################################
 #
 # Debug
@@ -79,7 +84,7 @@ def memoizer(*args, **kwargs):
 #
 ################################################################
 
-class OrderedSet(collections.MutableSet):
+class OrderedSet(collectionsAbc.MutableSet):
     """
     A set implementations that retains insertion order.  From the receipe
     http://code.activestate.com/recipes/576694/