diff --git a/settings.py b/settings.py
index ce1542cb83d..d262211b296 100644
--- a/settings.py
+++ b/settings.py
@@ -83,6 +83,7 @@
 NON_SUPPORTED_LOCALES = {
     'af': None,
     'br': 'fr',
+    'csb': 'pl',
     'nb-NO': 'no',
     'nn-NO': 'no',
     'oc': 'fr',