diff --git a/src/Database/PDOStatement.php b/src/Database/PDOStatement.php
index 43c7564..68c7622 100644
--- a/src/Database/PDOStatement.php
+++ b/src/Database/PDOStatement.php
@@ -6,7 +6,7 @@ class Database_PDOStatement extends PDOStatement implements IteratorAggregate
     public $cache = array();   
     public $fields;
 
-    function getIterator() {
+    function getIterator(): Iterator {
         return new Database_StatementIterator($this);
     }