diff --git a/python-virtinst.spec b/python-virtinst.spec
index 794232e..1876d26 100644
--- a/python-virtinst.spec
+++ b/python-virtinst.spec
@@ -17,8 +17,10 @@
 Summary: Python modules and utilities for installing virtual machines
 Name: python-%{appname}
 Version: 0.500.1
-Release: 1%{_extra_release}
+Release: 2%{_extra_release}
 Source0: http://virt-manager.org/download/sources/%{appname}/%{appname}-%{version}.tar.gz
+# Fix interface API detection for libvirt < 0.7.4
+Patch1: %{appname}-%{version}-fix-interface-detect.patch
 
 License: GPLv2+
 Group: Development/Libraries
@@ -46,6 +48,7 @@ and install new VMs) and virt-clone (clone an existing virtual machine).
 
 %prep
 %setup -q -n %{appname}-%{version}
+%patch1 -p1
 
 %build
 python setup.py build
@@ -81,6 +84,9 @@ rm -rf $RPM_BUILD_ROOT
 %{_bindir}/virt-convert
 
 %changelog
+* Wed Dec 09 2009 Cole Robinson <crobinso@redhat.com> - 0.500.1-2.fc12
+- Fix interface API detection for libvirt < 0.7.4
+
 * Thu Dec  3 2009 Cole Robinson <crobinso@redhat.com> - 0.500.1-1.fc12
 - Update to version 0.500.1
 - virt-install now attempts --os-variant detection by default.
diff --git a/virtinst-0.500.1-fix-interface-detect.patch b/virtinst-0.500.1-fix-interface-detect.patch
new file mode 100644
index 0000000..0d69259
--- /dev/null
+++ b/virtinst-0.500.1-fix-interface-detect.patch
@@ -0,0 +1,22 @@
+# HG changeset patch
+# User Cole Robinson <crobinso@redhat.com>
+# Date 1260392543 18000
+# Node ID 15c118a449a7e2c861b6630da31fcb25526af617
+# Parent  989eb68a9c1889c783152705e6ed7c0580dfa814
+support: Generic exceptions mean libvirt support is busted.
+
+Fixes testing for interface APIs on libvirt < 0.7.4
+
+diff -r 989eb68a9c18 -r 15c118a449a7 virtinst/support.py
+--- a/virtinst/support.py	Mon Dec 07 20:41:58 2009 +0000
++++ b/virtinst/support.py	Wed Dec 09 16:02:23 2009 -0500
+@@ -173,7 +173,8 @@
+             return False
+ 
+     except Exception:
+-        return True
++        # Other python exceptions likely mean the bindings are horked
++        return False
+ 
+     return True
+