diff --git a/shared/web/widgets.py b/shared/web/widgets.py
index 025e9b36..e0c1e25c 100644
--- a/shared/web/widgets.py
+++ b/shared/web/widgets.py
@@ -1076,7 +1076,7 @@ class RadioButtons(ExclusiveChoiceMixin, proxyWidgets.RadioButtons):
         fieldName = slot.getFieldName()
         kind = slot.getKind()
         try:
-            value = slot.getValue() or ''
+            value = slot.getValue()
         except IndexError:
             value = None