diff --git a/generate-tarball.sh b/generate-tarball.sh
index 74b872f..bf1e8ba 100755
--- a/generate-tarball.sh
+++ b/generate-tarball.sh
@@ -10,7 +10,7 @@ wget "http://www.antlr2.org/download/antlr-${version}.tar.gz" -O "${name}-${vers
 rm -rf tarball-tmp
 mkdir tarball-tmp
 cd tarball-tmp
-tar xf "../${name}-${version}.orig.tar.gz"
+tar -xf "../${name}-${version}.orig.tar.gz"
 
 # CLEAN TARBALL
 # contain questionable things, such as csflex.exe
@@ -20,6 +20,6 @@ find -name '*.exe' -delete
 find -name '*.dll' -delete
 find -name '*.so' -delete
 
-tar cf "../${name}-${version}.tar.gz" *
+tar -czf "../${name}-${version}.tar.gz" *
 cd ..
 rm -r tarball-tmp "${name}-${version}.orig.tar.gz"