diff --git a/rpm/kernel-obs-build.spec.in b/rpm/kernel-obs-build.spec.in
index e4c4cf2..64b49a9 100644
--- a/rpm/kernel-obs-build.spec.in
+++ b/rpm/kernel-obs-build.spec.in
@@ -162,14 +162,20 @@ install -d -m 0755 $RPM_BUILD_ROOT
 cp -v /boot/%{kernel_name}-*%{kernel_flavor} $RPM_BUILD_ROOT/.build.kernel.kvm
 cp -v /tmp/initrd.kvm $RPM_BUILD_ROOT/.build.initrd.kvm
 
+# inform worker about availability of virtio-serial
+touch %{buildroot}/.build.console.kvm
+if grep -qx CONFIG_VIRTIO_CONSOLE=y /boot/config-*%{kernel_flavor} ; then
+    echo "virtio" > %{buildroot}/.build.console.kvm
+fi
+
 #inform worker about arch
 #see obs-build commit e47399d738e51
 uname -m > $RPM_BUILD_ROOT/.build.hostarch.kvm
 
 %files
-%defattr(-,root,root)
 /.build.kernel.*
 /.build.initrd.*
 /.build.hostarch.*
+/.build.console.*
 
 %changelog