diff --git a/src/SKUI/html/window.html b/src/SKUI/html/window.html
index b1bd7c9..291cedb 100644
--- a/src/SKUI/html/window.html
+++ b/src/SKUI/html/window.html
@@ -5,7 +5,7 @@
   <meta http-equiv="content-type" content="text/html; charset=utf-8">
   <meta http-equiv="MSThemeCompatible" content="Yes">
 
-  <link rel="stylesheet" type="text/css" media="screen"
+  <link rel="stylesheet" type="text/css" media="screen" id="SKUI_CSS_CORE"
         href="../css/core.css" />
 
   <script type="text/javascript"