diff --git a/ObsoleteFiles.inc b/ObsoleteFiles.inc
index c749c8f5e316..185bdf4153bd 100644
--- a/ObsoleteFiles.inc
+++ b/ObsoleteFiles.inc
@@ -38,6 +38,9 @@
 #   xargs -n1 | sort | uniq -d;
 # done
 
+# 20170318: remove nls for non supported Big5* locales
+OLD_DIRS+=usr/share/nls/zh_HK.Big5HKSCS
+OLD_DIRS+=usr/share/nls/zh_TW.Big5
 # 20170319: Remove zh_TW.Big5
 OLD_FILES+=usr/share/locale/zh_TW.Big5/LC_COLLATE
 OLD_FILES+=usr/share/locale/zh_TW.Big5/LC_CTYPE
diff --git a/etc/mtree/BSD.usr.dist b/etc/mtree/BSD.usr.dist
index fa5508d7ae09..bd19b7b90f5d 100644
--- a/etc/mtree/BSD.usr.dist
+++ b/etc/mtree/BSD.usr.dist
@@ -1379,12 +1379,8 @@
             ..
             zh_CN.eucCN
             ..
-            zh_HK.Big5HKSCS
-            ..
             zh_HK.UTF-8
             ..
-            zh_TW.Big5
-            ..
             zh_TW.UTF-8
             ..
         ..