diff --git a/locale/iso-639.def b/locale/iso-639.def
index 926aebada0..242e768226 100644
--- a/locale/iso-639.def
+++ b/locale/iso-639.def
@@ -480,6 +480,7 @@ DEFINE_LANGUAGE_CODE3 ("Tiv", tiv, tiv)
 DEFINE_LANGUAGE_CODE3 ("Tlingit", tli, tli)
 DEFINE_LANGUAGE_CODE3 ("Tok Pisin", tpi, tpi)
 DEFINE_LANGUAGE_CODE3 ("Tokelau", tkl, tkl)
+DEFINE_LANGUAGE_CODE3 ("Toki Pona", tok, tok)
 DEFINE_LANGUAGE_CODE3 ("Tonga (Nyasa)", tog, tog)
 DEFINE_LANGUAGE_CODE ("Tonga (Tonga Islands)", to, ton, ton)
 DEFINE_LANGUAGE_CODE3 ("Tsimshian", tsi, tsi)