diff --git a/Form/EventListener/BindRequestListener.php b/Form/EventListener/BindRequestListener.php
index e0951f0..24e3cf6 100644
--- a/Form/EventListener/BindRequestListener.php
+++ b/Form/EventListener/BindRequestListener.php
@@ -113,7 +113,7 @@ private function unserializeForm($data, $form, $isXml, $isPatch)
 
             // If we are PATCHing then don't fill in missing attributes with null
             $childValue = $this->unserializeForm($value, $child, $isXml, $isPatch);
-            if (!($isPatch && !$childValue)) $result[$child->getName()] = $childValue;
+            if (!($isPatch && is_null($childValue))) $result[$child->getName()] = $childValue;
         }
 
         return $result;