diff --git a/ncurses.spec b/ncurses.spec
index 2b86cba..f249112 100644
--- a/ncurses.spec
+++ b/ncurses.spec
@@ -278,7 +278,7 @@ find -name '*.orig' | xargs -r rm -f
 # replace tack from ncurses tarball with the latest version in
 # separate tarball
 rm -fr tack
-tar  xfj %{S:5}
+tar  xfz %{S:5}
 mv tack-* tack
 %patch -P 1 -p0 -b .327x
 %patch -P 3 -p0 -b .ow