diff --git a/django/core/formfields.py b/django/core/formfields.py
index 5a60b52448..a25bdc16b2 100644
--- a/django/core/formfields.py
+++ b/django/core/formfields.py
@@ -897,10 +897,7 @@ class USStateField(TextField):
             raise validators.CriticalValidationError, e.messages
 
     def html2python(data):
-        if data:
-            return data.upper() # Should always be stored in upper case
-        else:
-            return None
+        return data.upper() # Should always be stored in upper case
     html2python = staticmethod(html2python)
 
 class CommaSeparatedIntegerField(TextField):