diff --git a/PackageKit-1.1.6-yumBackend-override_sigchecks.patch b/PackageKit-1.1.6-yumBackend-override_sigchecks.patch
new file mode 100644
index 0000000..5e27419
--- /dev/null
+++ b/PackageKit-1.1.6-yumBackend-override_sigchecks.patch
@@ -0,0 +1,12 @@
+diff -Nru PackageKit-1.1.6.orig/backends/yum/yumBackend.py PackageKit-1.1.6/backends/yum/yumBackend.py
+--- PackageKit-1.1.6.orig/backends/yum/yumBackend.py	2016-09-02 10:05:30.000000000 +0200
++++ PackageKit-1.1.6/backends/yum/yumBackend.py	2017-11-15 02:28:33.226701894 +0100
+@@ -1710,7 +1710,7 @@
+ 
+         if hasattr(self.yumbase, "_override_sigchecks"):
+             # _override_sigchecks logic is reversed
+-            override_sigchecks = not only_trusted
++            override_sigchecks = 1
+ 
+             self.yumbase._override_sigchecks = override_sigchecks
+ 
diff --git a/PackageKit.spec b/PackageKit.spec
index d157de4..43430de 100644
--- a/PackageKit.spec
+++ b/PackageKit.spec
@@ -1,6 +1,6 @@
 Name:          PackageKit
 Version:       1.1.6
-Release:       1mamba
+Release:       2mamba
 Summary:       A system designed to make installing and updating software on your computer easier
 Group:         System/Management
 Vendor:        openmamba
@@ -22,6 +22,7 @@ Patch10:       %{name}-0.6.21-revert_utf8_for_smart.patch
 Patch11:       PackageKit-0.6.22-display_smart_errors_as_html.patch
 Patch12:       PackageKit-0.8.11-smartBackend-fix-remove-packages.patch
 Patch13:       PackageKit-0.9.5-smartBackend-correctly-raise-exceptions.patch
+Patch14:       PackageKit-1.1.6-yumBackend-override_sigchecks.patch
 License:       GPL
 ## AUTOBUILDREQ-BEGIN
 BuildRequires: glibc-devel
@@ -179,6 +180,7 @@ This package contains static libraries and header files need for development.
 ##%patch12 -p1
 ##%patch13 -p1
 #sed -i "s|/usr/bin/python$|/usr/bin/python%{python27_version}|" backends/smart/smartBackend.py
+%patch14 -p1
 
 %build
 %configure \
@@ -294,6 +296,9 @@ rm -f %{buildroot}/var/lib/PackageKit/transactions.db
 #%{_libdir}/pkgconfig/packagekit-plugin.pc
 
 %changelog
+* Wed Nov 15 2017 Silvan Calarco <silvan.calarco@mambasoft.it> 1.1.6-2mamba
+- yum backend: patched to enable overriding signature checks
+
 * Sat Aug 26 2017 Silvan Calarco <silvan.calarco@mambasoft.it> 1.1.6-1mamba
 - update to 1.1.6