diff --git a/src/Connection.php b/src/Connection.php
index fdcad26..275f1e9 100644
--- a/src/Connection.php
+++ b/src/Connection.php
@@ -5,6 +5,8 @@ namespace Amp\Sql;
 use Amp\Promise;
 
 interface Connection extends Link {
+    public function connect(): Promise;
+
     /**
      * @return bool False if the connection has been closed.
      */