diff --git a/module/VuFind/src/VuFind/RecordDriver/SolrAuth.php b/module/VuFind/src/VuFind/RecordDriver/SolrAuth.php
index 2a885aaa7f3ad0bb32832a0b6deb46cb09bf07a2..015136797d3dc7799909cb4565601f9c222099b0 100644
--- a/module/VuFind/src/VuFind/RecordDriver/SolrAuth.php
+++ b/module/VuFind/src/VuFind/RecordDriver/SolrAuth.php
@@ -38,13 +38,6 @@ namespace VuFind\RecordDriver;
  */
 class SolrAuth extends SolrMarc
 {
-    /**
-     * Used for identifying database records
-     *
-     * @var string
-     */
-    protected $resourceSource = 'SolrAuth';
-
     /**
      * Get the short (pre-subtitle) title of the record.
      *