diff --git a/input/forms.py b/input/forms.py
index 362a3d3..0ab4f84 100755
--- a/input/forms.py
+++ b/input/forms.py
@@ -295,7 +295,7 @@ class LiteratureForm(TermsForm):
             return cleaned_data
 
         for field in 'selfbuy_data', 'selfbuy_give_data':
-            if not cleaned_data.get('selfbuy_data'):
+            if not cleaned_data.get(field):
                 self.add_error(field, trans('This field is required.'))
 
         return cleaned_data