diff --git a/src/SpeckInstall/Mapper/Install.php b/src/SpeckInstall/Mapper/Install.php
index e6d4e31..b25683e 100644
--- a/src/SpeckInstall/Mapper/Install.php
+++ b/src/SpeckInstall/Mapper/Install.php
@@ -21,7 +21,15 @@ public function dbConfig($params)
 
         $config['db']['username'] = $params['user'];
         $config['db']['password'] = $params['pass'];
-        $config['db']['dsn'] = "mysql:dbname={$params['db_name']};host={$params['host']}";
+
+        $host = $params['host'];
+        $port = (int) $params['port'];
+
+        if($port && (strpos(':', $params['host']) === false)) {
+            $host .= ':' . $port;
+        }
+
+        $config['db']['dsn'] = "mysql:dbname={$params['db_name']};host={$host}";
 
         return $config;
     }