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-rw-r--r--django/db/models/sql/query.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/django/db/models/sql/query.py b/django/db/models/sql/query.py
index 43026d2d82..223e516d56 100644
--- a/django/db/models/sql/query.py
+++ b/django/db/models/sql/query.py
@@ -1031,7 +1031,7 @@ class Query(object):
# Interpret '__exact=None' as the sql 'is NULL'; otherwise, reject all
# uses of None as a query value.
if value is None:
- if lookup_type != 'exact':
+ if lookup_type not in ('exact', 'iexact'):
raise ValueError("Cannot use None as a query value")
lookup_type = 'isnull'
value = True