diff --git a/python-cryptography-1.5.2-fix_available_backends.patch b/python-cryptography-1.5.2-fix_available_backends.patch
new file mode 100644
index 0000000..bde50ba
--- /dev/null
+++ b/python-cryptography-1.5.2-fix_available_backends.patch
@@ -0,0 +1,26 @@
+--- cryptography-1.5.2/src/cryptography/hazmat/backends/__init__.py.orig	2016-10-17 12:23:32.705257213 +0200
++++ cryptography-1.5.2/src/cryptography/hazmat/backends/__init__.py	2016-10-17 12:23:48.238260931 +0200
+@@ -29,6 +29,23 @@
+             )
+         ]
+ 
++    if _available_backends_list is None or len(_available_backends_list) == 0:
++        # backend 1
++        try:
++            from cryptography.hazmat.backends.commoncrypto.backend import backend as be_cc
++        except ImportError:
++            be_cc = None
++        # backend 2
++        try:
++            from cryptography.hazmat.backends.openssl.backend import backend as be_ossl
++        except ImportError:
++            be_ossl = None
++        # add any backends of your own
++
++        _available_backends_list = [
++            be for be in (be_cc, be_ossl) if be is not None
++        ]
++
+     return _available_backends_list
+ 
+ _default_backend = None
diff --git a/python-cryptography.spec b/python-cryptography.spec
index d2ea528..bd2613c 100644
--- a/python-cryptography.spec
+++ b/python-cryptography.spec
@@ -1,6 +1,6 @@
 Name:          python-cryptography
 Version:       1.5.2
-Release:       1mamba
+Release:       2mamba
 Summary:       Cryptographic recipes and primitives to Python developers
 Group:         System/Libraries
 Vendor:        openmamba
@@ -8,6 +8,7 @@ Distribution:  openmamba
 Packager:      Silvan Calarco <silvan.calarco@mambasoft.it>
 URL:           https://github.com/pyca/cryptography
 Source:        https://pypi.debian.net/cryptography/cryptography-%{version}.tar.gz
+Patch0:        python-cryptography-1.5.2-fix_available_backends.patch
 License:       BSD
 ## AUTOBUILDREQ-BEGIN
 BuildRequires: glibc-devel
@@ -27,6 +28,7 @@ BuildRoot:     %{_tmppath}/%{name}-%{version}-root
 
 %prep
 %setup -q -n cryptography-%{version}
+%patch0 -p1
 
 %build
 CFLAGS="%{optflags}" %{__python} setup.py build
@@ -47,6 +49,9 @@ CFLAGS="%{optflags}" %{__python} setup.py build
 %doc LICENSE
 
 %changelog
+* Mon Oct 17 2016 Silvan Calarco <silvan.calarco@mambasoft.it> 1.5.2-2mamba
+- patched to fix no _available_backends problem (see http://stackoverflow.com/questions/38277915/python-cryptography-multibackend-cannot-be-innitialized#38285941)
+
 * Tue Sep 27 2016 Automatic Build System <autodist@mambasoft.it> 1.5.2-1mamba
 - automatic version update by autodist