diff --git a/manifest.toml b/manifest.toml
index 3da43df..4e0a9d5 100644
--- a/manifest.toml
+++ b/manifest.toml
@@ -22,3 +22,4 @@ legacy_product_codes = [
     { value = "C3361F3B-4D16-4B28-8661-C77F335066D9", kind = "nsis" },
     { value = "0B2EDA2C-A572-48D7-9DD0-54DE9F17670C", kind = "nsis" }
 ]
+extra_locales = { tau-US = "tau" }
diff --git a/manifest.toml.in b/manifest.toml.in
index c9ea3e8..506b440 100644
--- a/manifest.toml.in
+++ b/manifest.toml.in
@@ -22,3 +22,4 @@ legacy_product_codes = [
     { value = "C3361F3B-4D16-4B28-8661-C77F335066D9", kind = "nsis" },
     { value = "0B2EDA2C-A572-48D7-9DD0-54DE9F17670C", kind = "nsis" }
 ]
+extra_locales = { tau-US = "tau" }