diff -urNad myspell.pt.orig/myspell.pt-20091013/debian/rules myspell.pt/myspell.pt-20091013/debian/rules
--- myspell.pt.orig/myspell.pt-20091013/debian/rules	2015-02-12 22:06:44.220100771 +0000
+++ myspell.pt/myspell.pt-20091013/debian/rules	2015-02-12 22:08:36.101061782 +0000
@@ -28,7 +28,7 @@
 build-stamp: configure-stamp  #patch-stamp
 	dh_testdir
         # -- aspell
-	sed -e '1d' -e '/[\. ]/d' pt_PT.dic | prezip -s -c | gzip -9 -c > debian/aspell-files/pt_PT.cwl.gz
+	sed -e '1d' -e '/[\. ]/d' pt_PT.dic | prezip -s -c | gzip -9n -c > debian/aspell-files/pt_PT.cwl.gz
 	install -m 0644 pt_PT.aff debian/aspell-files/pt_PT_affix.dat
         # -- myspell
 	mkdir -p $(OOOTMP)