diff --git a/src/pretix/_base_settings.py b/src/pretix/_base_settings.py
index 4f5b5cd94f..c79be4e8fc 100644
--- a/src/pretix/_base_settings.py
+++ b/src/pretix/_base_settings.py
@@ -94,7 +94,7 @@ ALL_LANGUAGES = [
     ('el', _('Greek')),
     ('id', _('Indonesian')),
     ('it', _('Italian')),
-    ('jp', _('Japanese')),
+    ('ja', _('Japanese')),
     ('lv', _('Latvian')),
     ('nb-no', _('Norwegian Bokmål')),
     ('pl', _('Polish')),