diff --git a/base/univention-config-registry/python/univention/config_registry/backend.py b/base/univention-config-registry/python/univention/config_registry/backend.py
index fb0c683d094..b11db602588 100644
--- a/base/univention-config-registry/python/univention/config_registry/backend.py
+++ b/base/univention-config-registry/python/univention/config_registry/backend.py
@@ -36,7 +36,10 @@
 import re
 import errno
 import time
-from collections.abc import MutableMapping
+try:
+	from collections.abc import MutableMapping  # Python 3.3+
+except ImportError:
+	from collections import MutableMapping
 import six
 try:
 	from typing import overload, Any, Dict, IO, Iterator, List, NoReturn, Optional, Set, Tuple, Type, TypeVar, Union  # noqa F401