diff --git a/virtio-win.spec b/virtio-win.spec
index 2ba09d8..dbdeb42 100644
--- a/virtio-win.spec
+++ b/virtio-win.spec
@@ -3,7 +3,7 @@
 Summary: VirtIO para-virtualized drivers for Windows(R)
 Name: virtio-win
 Version: 1.0.0
-Release: 1.%{svnnum}%{?dist}
+Release: 1.%{svnnum}.prewhql%{?dist}
 License: GPLv2
 Group: Applications/System
 URL: http://www.redhat.com/