diff --git a/contrib/packaging/wix/contrib.wxs b/contrib/packaging/wix/contrib.wxs
--- a/contrib/packaging/wix/contrib.wxs
+++ b/contrib/packaging/wix/contrib.wxs
@@ -21,6 +21,7 @@
           <File Name="hgweb.wsgi" />
           <File Name="logo-droplets.svg" />
           <File Name="mercurial.el" />
+          <File Name="mq.el" />
           <File Name="tcsh_completion" />
           <File Name="tcsh_completion_build.sh" />
           <File Name="xml.rnc" />