diff --git a/CHANGES b/CHANGES
index 8bc3f96..198578a 100644
--- a/CHANGES
+++ b/CHANGES
@@ -3,6 +3,10 @@ Released 2.4.24 2016-01-18
 
 Changes since 2.4.23:
 
+Lib/
+* Work-around for attrlist=None regression introduced in 2.4.23
+  by ref count patch
+
 ----------------------------------------------------------------
 Released 2.4.23 2016-01-17
 
@@ -1230,4 +1234,4 @@ Released 2.0.0pre02 2002-02-01
 ----------------------------------------------------------------
 Released 1.10alpha3 2000-09-19
 
-$Id: CHANGES,v 1.367 2016/01/17 20:30:43 stroeder Exp $
+$Id: CHANGES,v 1.368 2016/01/17 20:31:54 stroeder Exp $
diff --git a/Lib/ldap/ldapobject.py b/Lib/ldap/ldapobject.py
index 8205bd4..e8e0b5d 100644
--- a/Lib/ldap/ldapobject.py
+++ b/Lib/ldap/ldapobject.py
@@ -3,7 +3,7 @@
 
 See http://www.python-ldap.org/ for details.
 
-\$Id: ldapobject.py,v 1.149 2015/10/24 15:46:12 stroeder Exp $
+\$Id: ldapobject.py,v 1.150 2016/01/17 20:31:54 stroeder Exp $
 
 Compability:
 - Tested with Python 2.0+ but should work with Python 1.5.x
@@ -580,7 +580,7 @@ def search_ext(self,base,scope,filterstr='(objectClass=*)',attrlist=None,attrson
     return self._ldap_call(
       self._l.search_ext,
       base,scope,filterstr,
-      attrlist,attrsonly,
+      attrlist or [],attrsonly,
       RequestControlTuples(serverctrls),
       RequestControlTuples(clientctrls),
       timeout,sizelimit,