diff --git a/library/Icinga/Chart/Primitive/Rect.php b/library/Icinga/Chart/Primitive/Rect.php
index 0145e0748..1699f87ce 100644
--- a/library/Icinga/Chart/Primitive/Rect.php
+++ b/library/Icinga/Chart/Primitive/Rect.php
@@ -3,7 +3,7 @@
 
 namespace Icinga\Chart\Primitive;
 
-use DomElement;
+use DOMElement;
 use Icinga\Chart\Render\RenderContext;
 use Icinga\Chart\Format;