diff --git a/release.sh b/release.sh
index 2f2e3d1c..5cacfc71 100755
--- a/release.sh
+++ b/release.sh
@@ -3,6 +3,7 @@ UNORDERED_DST=$TARBALL_DIR/unordered
 
 mkdir -p $TARBALL_DIR
 rm $TARBALL_DIR/unordered.tar.gz
+rm $TARBALL_DIR/unordered.zip
 rm -rf $TARBALL_DIR/unordered
 
 svn export . $UNORDERED_DST
@@ -20,6 +21,7 @@ rm $UNORDERED_DST/release.sh
 
 cd $TARBALL_DIR
 tar -czf unordered.tar.gz unordered
+zip -r unordered.zip unordered
 cd -
 
 rm -r $UNORDERED_DST