diff --git a/templates/img-viewer/app.tmpl b/templates/img-viewer/app.tmpl
index 3891f18..1a4ec82 100644
--- a/templates/img-viewer/app.tmpl
+++ b/templates/img-viewer/app.tmpl
@@ -1,5 +1,5 @@
 {{ define "img-viewer/app.tmpl" }}
-    <div id="TestWindowHeader" class="WindowFrameTopBar D">
+    <div id="TestWindowHeader" class="WindowFrameTopBar DragArea">
         <button id="closeWindowButton" class="WindowFrameTopBarButton" title="Close Window"></button>
         <div id="Drag" class="WindowDragArea"></div>
         <div class="WindowFrameTitle">