diff --git a/CHANGELOG b/CHANGELOG
index 776c28d55..f31fbe909 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,10 @@
+UNRELEASED
+-----------------------------------
+
+- fix issue409 -- better interoperate with cx_freeze by not
+  trying to import from collections.abc which causes problems for py27/cx_freeze.
+  Thanks Wolfgang L. for reporting and tracking it down.
+
 2.5.1
 -----------------------------------
 
diff --git a/_pytest/__init__.py b/_pytest/__init__.py
index 06da340f7..2ec33245d 100644
--- a/_pytest/__init__.py
+++ b/_pytest/__init__.py
@@ -1,2 +1,2 @@
 #
-__version__ = '2.5.1'
+__version__ = '2.5.2.dev1'
diff --git a/_pytest/assertion/util.py b/_pytest/assertion/util.py
index 1787e7354..258fee8a8 100644
--- a/_pytest/assertion/util.py
+++ b/_pytest/assertion/util.py
@@ -2,13 +2,9 @@
 
 import py
 try:
-    from collections.abc import Sequence
+    from collections import Sequence
 except ImportError:
-    try:
-        from collections import Sequence
-    except ImportError:
-        Sequence = list
-
+    Sequence = list
 
 BuiltinAssertionError = py.builtin.builtins.AssertionError
 u = py.builtin._totext
diff --git a/setup.py b/setup.py
index 6ef9d4852..9e2fa3e3d 100644
--- a/setup.py
+++ b/setup.py
@@ -27,7 +27,7 @@ def main():
         name='pytest',
         description='py.test: simple powerful testing with Python',
         long_description = long_description,
-        version='2.5.1',
+        version='2.5.2.dev1',
         url='http://pytest.org',
         license='MIT license',
         platforms=['unix', 'linux', 'osx', 'cygwin', 'win32'],