diff --git a/config/database.php b/config/database.php
index 3445e76455..734cab0082 100644
--- a/config/database.php
+++ b/config/database.php
@@ -27,6 +27,7 @@ $host        = '';
 $username    = '';
 $password    = '';
 $database    = '';
+$port        = '';
 
 if (!(false === $databaseUrl)) {