diff --git a/superset/config.py b/superset/config.py
index 6075352e2771..8a1b1063732a 100644
--- a/superset/config.py
+++ b/superset/config.py
@@ -164,7 +164,7 @@
     'zh': {'flag': 'cn', 'name': 'Chinese'},
     'ja': {'flag': 'jp', 'name': 'Japanese'},
     'de': {'flag': 'de', 'name': 'German'},
-    'pt-BR': {'flag': 'br', 'name': 'Brazilian Portuguese'},
+    'pt_BR': {'flag': 'br', 'name': 'Brazilian Portuguese'},
     'ru': {'flag': 'ru', 'name': 'Russian'},
 }
 # ---------------------------------------------------