diff --git a/iso3166.tab b/iso3166.tab
index 20e6c52..5b38195 100644
--- a/iso3166.tab
+++ b/iso3166.tab
@@ -159,7 +159,7 @@ MK	Macedonia
 ML	Mali
 MM	Myanmar (Burma)
 MN	Mongolia
-MO	Macao
+MO	Macau
 MP	Northern Mariana Islands
 MQ	Martinique
 MR	Mauritania