diff --git a/mkspecs/common/winrt_winphone/manifests/8.1_wp/AppxManifest.xml.in b/mkspecs/common/winrt_winphone/manifests/8.1_wp/AppxManifest.xml.in
index 235fe96794..b989f41efe 100644
--- a/mkspecs/common/winrt_winphone/manifests/8.1_wp/AppxManifest.xml.in
+++ b/mkspecs/common/winrt_winphone/manifests/8.1_wp/AppxManifest.xml.in
@@ -1,5 +1,5 @@
 <?xml version=\"1.0\" encoding=\"utf-8\"?>
-<Package xmlns=\"http://schemas.microsoft.com/appx/2010/manifest\" xmlns:m3=\"http://schemas.microsoft.com/appx/2014/manifest\" xmlns:mp=\"http://schemas.microsoft.com/appx/2014/phone/manifest\">
+<Package xmlns=\"http://schemas.microsoft.com/appx/2010/manifest\" xmlns:m2=\"http://schemas.microsoft.com/appx/2013/manifest\" xmlns:m3=\"http://schemas.microsoft.com/appx/2014/manifest\" xmlns:mp=\"http://schemas.microsoft.com/appx/2014/phone/manifest\">
   <Identity
     Name=\"$${WINRT_MANIFEST.identity}\"
     ProcessorArchitecture=\"$${WINRT_MANIFEST.architecture}\"