diff --git a/libproxy-0.4.12-fix-python-crash.patch b/libproxy-0.4.12-fix-python-crash.patch
new file mode 100644
index 0000000..59e75ca
--- /dev/null
+++ b/libproxy-0.4.12-fix-python-crash.patch
@@ -0,0 +1,37 @@
+From 76b89df0efc0fe817d320b7b34b2b0530ffd5538 Mon Sep 17 00:00:00 2001
+From: David King <dking@redhat.com>
+Date: Fri, 4 Mar 2016 14:19:29 +0000
+Subject: [PATCH] python: Avoid a crash on 64-bit systems
+
+Annotate the return type of px_proxy_factory_new() to be void *, as otherwise
+int is assumed. This works fine on 32-bit systems, where void * and int are the
+same width, but is invalid on 64-bit (Linux) systems.
+
+Additionally, annotate the argument type of free() and px_proxy_factory_free()
+to be void * to match.
+
+https://code.google.com/archive/p/libproxy/issues/146
+---
+ bindings/python/libproxy.py | 4 ++++
+ 1 file changed, 4 insertions(+)
+
+diff --git a/bindings/python/libproxy.py b/bindings/python/libproxy.py
+index cb75a4d..7bddba9 100644
+--- a/bindings/python/libproxy.py
++++ b/bindings/python/libproxy.py
+@@ -40,8 +40,12 @@ if platform.system() == "Windows":
+ else:
+     _libc = _load("c", 6)
+ 
++_libc.free.argtypes = ctypes.c_void_p,
++
+ # Load libproxy
+ _libproxy = _load("proxy", 1)
++_libproxy.px_proxy_factory_new.restype = ctypes.POINTER(ctypes.c_void_p)
++_libproxy.px_proxy_factory_free.argtypes = ctypes.c_void_p,
+ _libproxy.px_proxy_factory_get_proxies.restype = ctypes.POINTER(ctypes.c_void_p)
+ 
+ class ProxyFactory(object):
+-- 
+2.7.2
+
diff --git a/libproxy.spec b/libproxy.spec
index 1554432..8bd5f2d 100644
--- a/libproxy.spec
+++ b/libproxy.spec
@@ -4,7 +4,7 @@
 
 Name:           libproxy
 Version:        0.4.12
-Release:        1%{?dist}
+Release:        2%{?dist}
 Summary:        A library handling all the details of proxy configuration
 
 Group:          System Environment/Libraries
@@ -19,6 +19,8 @@ Patch0:         0001-Add-config-module-for-querying-PacRunner-d-mon.patch
 Patch1:         libproxy-0.4.12-javascriptcoregtk4.patch
 Patch2:         libproxy-0.4.12-use-correct-delete.patch
 Patch3:         libproxy-0.4.12-fix-kde-slowdown.patch
+# Fix a Python bindings crash on 64-bit systems.
+Patch4:         libproxy-0.4.12-fix-python-crash.patch
 
 BuildRequires:  python2-devel
 BuildRequires:  libmodman-devel >= 2.0.1
@@ -152,6 +154,7 @@ developing applications that use %{name}.
 %patch1 -p1
 %patch2 -p1
 %patch3 -p1
+%patch4 -p1
 
 %build
 %{cmake} \
@@ -227,6 +230,9 @@ make test
 
 
 %changelog
+* Fri Mar 04 2016 David King <amigadave@amigadave.com> - 0.4.12-2
+- Fix a Python bindings crash on 64-bit systems (#1296817)
+
 * Mon Feb 29 2016 David King <amigadave@amigadave.com> - 0.4.12-1
 - Update to 0.4.12
 - Simplify conditional macros