diff --git a/system/zfs-on-linux/zfs-on-linux.SlackBuild b/system/zfs-on-linux/zfs-on-linux.SlackBuild
index 2dc9b6b686..a86d88677b 100644
--- a/system/zfs-on-linux/zfs-on-linux.SlackBuild
+++ b/system/zfs-on-linux/zfs-on-linux.SlackBuild
@@ -123,4 +123,4 @@ cat $CWD/slack-desc > $PKG/install/slack-desc
 cat $CWD/doinst.sh > $PKG/install/doinst.sh
 
 cd $PKG
-/sbin/makepkg -l y -c n $OUTPUT/$PRGNAM-${VERSION}_${KERN}-$ARCH-$BUILD$TAG.${PKGTYPE:-txz}
+/sbin/makepkg -l y -c n $OUTPUT/$PRGNAM-${VERSION}_${KERN}-$ARCH-$BUILD$TAG.${PKGTYPE:-tgz}