diff --git a/system/locale.nix b/system/locale.nix
index 07e7175..e2c7e81 100644
--- a/system/locale.nix
+++ b/system/locale.nix
@@ -2,7 +2,7 @@
 {
   time.timeZone = "America/Sao_Paulo";
   environment.variables.TZ = config.time.timeZone;
-  i18n.defaultLocale = "pt_BR.utf8";
+  i18n.defaultLocale = "pt_BR.UTF-8";
 
   # Configure keymap in X11
   services.xserver.xkb = {