diff --git a/doc/build_draft.sh b/doc/build_draft.sh
index dabdf017a2977617e711c658dca539b76110fff2..4254f166d494ef3ff237a531e2ce07d1b2cb66c4 100755
--- a/doc/build_draft.sh
+++ b/doc/build_draft.sh
@@ -35,7 +35,7 @@ cp -a "${toplevel}"/README.draft "${destdir}"/README
 cp -a "${toplevel}"/COPYING "${destdir}"/COPYING
 cp -a "${toplevel}"/tests/run_vectors.sh "${destdir}"/
 
-GZIP=-9 tar --owner=root --group=root --old-archive -czf opus_source.tar.gz "${destdir}"
+GZIP=-9 tar --owner=root --group=root --format=v7 -czf opus_source.tar.gz "${destdir}"
 echo building base64 version
 cat opus_source.tar.gz| base64 | tr -d '\n' | fold -w 64 | \
  sed -e 's/^/\<spanx style="vbare"\>###/' -e 's/$/\<\/spanx\>\<vspace\/\>/' > \