diff --git a/src/upload/admin/controller/extension/payment/bitpay.php b/src/upload/admin/controller/extension/payment/bitpay.php
index 2360f40..a675192 100644
--- a/src/upload/admin/controller/extension/payment/bitpay.php
+++ b/src/upload/admin/controller/extension/payment/bitpay.php
@@ -519,7 +519,7 @@ public function install() {
 			}
 		}
                 //Delete old settings from previous bitpay installation
-                $this->db->query("delete from oc_setting where code='bitpay'");
+                $this->db->query("delete from ".DB_PREFIX."setting where code='bitpay'");
 		$this->load->model('setting/setting');
 		$default_settings = array(
 			'payment_bitpay_private_key' => null,