diff --git a/tools/mkpkg/mkpkg_xbmc-gotham b/tools/mkpkg/mkpkg_xbmc-gotham
index faf3682ec5..ea170e32cc 100755
--- a/tools/mkpkg/mkpkg_xbmc-gotham
+++ b/tools/mkpkg/mkpkg_xbmc-gotham
@@ -38,7 +38,7 @@ echo "getting sources..."
   cd ..
 
   if [ -z "$PKG_VERSION" ]; then
-      PKG_VERSION="$GIT_REV"
+      PKG_VERSION="13.alpha-$GIT_REV"
   fi
 
 echo "copying sources..."