diff --git a/include/dblayer/functions_mysqli.inc.php b/include/dblayer/functions_mysqli.inc.php
index 68ed83f2a..508f1c470 100644
--- a/include/dblayer/functions_mysqli.inc.php
+++ b/include/dblayer/functions_mysqli.inc.php
@@ -45,6 +45,7 @@ function pwg_db_connect($host, $user, $password, $database)
   elseif (strpos($host, ':') !== false)
   {
     list($host, $port) = explode(':', $host);
+    $port = (int) $port;
   }
 
   $dbname = '';