diff --git a/generate-tarball.sh b/generate-tarball.sh
index 61f3f62..3a981f8 100755
--- a/generate-tarball.sh
+++ b/generate-tarball.sh
@@ -1,8 +1,8 @@
 #!/bin/sh
 
-VERSION=$1
+VERSION="$1"
 
-rm -rf ghostscript-$VERSION
-tar jxvf ghostscript-$VERSION.tar.bz2
-rm -r ghostscript-$VERSION/jpegxr
-tar jcvf ghostscript-$VERSION-cleaned.tar.bz2 ghostscript-$VERSION
+rm -rf ghostscript-"$VERSION"
+tar jxvf ghostscript-"$VERSION".tar.bz2
+rm -r ghostscript-"$VERSION"/jpegxr
+tar jcvf ghostscript-"$VERSION"-cleaned.tar.bz2 ghostscript-"$VERSION"