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-rw-r--r--django/oldforms/__init__.py4
1 files changed, 3 insertions, 1 deletions
diff --git a/django/oldforms/__init__.py b/django/oldforms/__init__.py
index b437109596..decf0f7064 100644
--- a/django/oldforms/__init__.py
+++ b/django/oldforms/__init__.py
@@ -958,7 +958,9 @@ class USStateField(TextField):
raise validators.CriticalValidationError, e.messages
def html2python(data):
- return data.upper() # Should always be stored in upper case
+ if data:
+ return data.upper() # Should always be stored in upper case
+ return data
html2python = staticmethod(html2python)
class CommaSeparatedIntegerField(TextField):