diff --git a/include/preinteressent.class.php b/include/preinteressent.class.php
index b4c5b3597..82705a9cb 100644
--- a/include/preinteressent.class.php
+++ b/include/preinteressent.class.php
@@ -146,7 +146,7 @@ class preinteressent extends basis_db
 						$this->db_add_param($row->aufmerksamdurch_kurzbz).', '.
 						$this->db_add_param($row->firma_id, FHC_INTEGER).', '.
 						$this->db_add_param($row->erfassungsdatum).', '.
-						$this->db_add_param($row->einverstaendnis, FHC_BOOLEAN).', '.
+						$this->db_add_param($this->db_parse_bool($row->einverstaendnis), FHC_BOOLEAN).', '.
 						$this->db_add_param($row->absagedatum).', '.
 						$this->db_add_param($row->anmerkung).', '.
 						$this->db_add_param($row->insertamum).', '.