diff --git a/includes/content.node_form.inc b/includes/content.node_form.inc
index 7f5b166..8d59fdc 100644
--- a/includes/content.node_form.inc
+++ b/includes/content.node_form.inc
@@ -361,8 +361,10 @@ function content_multiple_value_nodeapi_validate(&$node, $field, &$items, $form)
   $items_copy = $items;
 
   // Filter out items flagged for removal.
-  $items = content_set_empty($field, $items);
-
+  if ($field) {
+    $items = content_set_empty($field, $items);
+  }
+  
   // Enforce field requirement settings.
   if ($field['required'] && empty($node->_content_ignore_required_fields[$field_name]) && content_access('edit', $field, NULL, $node)) {
     // Count non-empty items.