diff --git a/library/Director/Import/ImportSourceCoreApi.php b/library/Director/Import/ImportSourceCoreApi.php
index 6d590ec3..3c54d485 100644
--- a/library/Director/Import/ImportSourceCoreApi.php
+++ b/library/Director/Import/ImportSourceCoreApi.php
@@ -30,7 +30,7 @@ class ImportSourceCoreApi extends ImportSourceHook
     public function listColumns()
     {
         $res = $this->fetchData();
-        if (empty($data)) {
+        if (empty($res)) {
             return array('object_name');
         }