diff --git a/resources/classes/switch_settings.php b/resources/classes/switch_settings.php
index 734b79c5c2..6fae05f386 100644
--- a/resources/classes/switch_settings.php
+++ b/resources/classes/switch_settings.php
@@ -250,7 +250,7 @@ if (!class_exists('switch_settings')) {
 						}
 						$i++;
 					}
-					$db->exec(check_sql($sql));
+					$this->db->exec(check_sql($sql));
 					unset($missing);
 				}