diff --git a/locale/iso-639.def b/locale/iso-639.def
index 1b1456d0a4..83eb7619a1 100644
--- a/locale/iso-639.def
+++ b/locale/iso-639.def
@@ -408,6 +408,7 @@ DEFINE_LANGUAGE_CODE ("Romanian", ro, ron, rum)
 DEFINE_LANGUAGE_CODE3 ("Romany", rom, rom)
 DEFINE_LANGUAGE_CODE ("Rundi", rn, run, run)
 DEFINE_LANGUAGE_CODE ("Russian", ru, rus, rus)
+DEFINE_LANGUAGE_CODE3 ("Saho", ssy, ssy)
 DEFINE_LANGUAGE_CODE3 ("Samogitian", sgs, sgs)
 DEFINE_LANGUAGE_CODE3 ("Salishan languages", sal, sal)
 DEFINE_LANGUAGE_CODE3 ("Samaritan Aramaic", sam, sam)