diff --git a/corehq/apps/users/models.py b/corehq/apps/users/models.py
index 4ba6d39b5e90..7be1a1291170 100644
--- a/corehq/apps/users/models.py
+++ b/corehq/apps/users/models.py
@@ -1170,7 +1170,7 @@ def get_django_user(self, use_primary_db=False):
         queryset = User.objects
         if use_primary_db:
             queryset = queryset.using(router.db_for_write(User))
-        return queryset.get(username__iexact=self.username)
+        return queryset.get(username=self.username)
 
     def add_phone_number(self, phone_number, default=False, **kwargs):
         """ Don't add phone numbers if they already exist """