diff --git a/lib/Doctrine/ORM/AbstractQuery.php b/lib/Doctrine/ORM/AbstractQuery.php
index bd49e30ca..576c3a296 100644
--- a/lib/Doctrine/ORM/AbstractQuery.php
+++ b/lib/Doctrine/ORM/AbstractQuery.php
@@ -154,7 +154,7 @@ abstract class AbstractQuery
     public function getParameters($params = array())
     {
         if ($params) {
-            return array_merge($this->_params, $params);
+            return ($this->_params + $params);
         }
         return $this->_params;
     }
diff --git a/tests/Doctrine/Tests/ORM/Functional/QueryTest.php b/tests/Doctrine/Tests/ORM/Functional/QueryTest.php
index 816753ca5..2b20e1667 100644
--- a/tests/Doctrine/Tests/ORM/Functional/QueryTest.php
+++ b/tests/Doctrine/Tests/ORM/Functional/QueryTest.php
@@ -29,6 +29,19 @@ class QueryTest extends \Doctrine\Tests\OrmFunctionalTestCase
         $query->execute(array(42)); // same as array(0 => 42), 0 is invalid parameter position
     }
 
+    public function testGetParameters()
+    {
+        $query = $this->_em->createQuery("select u from Doctrine\Tests\Models\CMS\CmsUser u where u.username = ?1");
+        $this->assertEquals(array(1 => 42), $query->getParameters(array(1 => 42)));
+    }
+
+    public function testGetParameters_HasSomeAlready()
+    {
+        $query = $this->_em->createQuery("select u from Doctrine\Tests\Models\CMS\CmsUser u where u.username = ?1");
+        $query->setParameter(2, 84);
+        $this->assertEquals(array(2 => 84, 1 => 42), $query->getParameters(array(1 => 42)));
+    }
+
     public function testSimpleQueries()
     {
         $user = new CmsUser;