diff --git a/db/db.update.62.php b/db/db.update.62.php
index bd9ecc4b..a3d99f54 100644
--- a/db/db.update.62.php
+++ b/db/db.update.62.php
@@ -37,7 +37,7 @@ function db_update_62_post()
 			$passwordexpiry = "DATE_ADD(CURDATE(),
 				INTERVAL {$config['committee_password_expiry_days']} DAY)";
 		} else {
-			$passwordexpiry = "'0000-00-00'";
+			$passwordexpiry = "NULL";
 		}
 
 		$deleted = ($c['deleted'] == 'Y') ? 'yes' : 'no';