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-rw-r--r--docs/ref/settings.txt4
1 files changed, 4 insertions, 0 deletions
diff --git a/docs/ref/settings.txt b/docs/ref/settings.txt
index ef52d3170c..897af275a0 100644
--- a/docs/ref/settings.txt
+++ b/docs/ref/settings.txt
@@ -852,6 +852,10 @@ It is also important to remember that when running with :setting:`DEBUG`
turned on, Django will remember every SQL query it executes. This is useful
when you're debugging, but it'll rapidly consume memory on a production server.
+Finally, if :setting:`DEBUG` is ``False``, you also need to properly set
+the :setting:`ALLOWED_HOSTS` setting. Failing to do so will result in all
+requests being returned as "Bad Request (400)".
+
.. _django/views/debug.py: https://github.com/django/django/blob/master/django/views/debug.py
.. setting:: DEBUG_PROPAGATE_EXCEPTIONS