diff --git a/src/main/java/org/olat/core/gui/components/download/DisplayOrDownloadComponentRenderer.java b/src/main/java/org/olat/core/gui/components/download/DisplayOrDownloadComponentRenderer.java
index d4e65e81330bd84ed6daa795b413f0afa3420e53..99a4a7328093c03399af7b1890c06933a7d56400 100644
--- a/src/main/java/org/olat/core/gui/components/download/DisplayOrDownloadComponentRenderer.java
+++ b/src/main/java/org/olat/core/gui/components/download/DisplayOrDownloadComponentRenderer.java
@@ -56,8 +56,8 @@ class DisplayOrDownloadComponentRenderer implements ComponentRenderer {
 			// use javascript to open a new file that loads the file.
 			sb.append("<script type='text/javascript'>");
 			sb.append("/* <![CDATA[ */ ");
-			sb.append("Ext.onReady(function() {");
-			sb.append("window.open('").append(fileUrl).append("', 'downloadwindow','');");
+			sb.append("jQuery(function() {");
+			sb.append("  window.open('").append(fileUrl).append("', 'downloadwindow','');");
 			sb.append("});");
 			sb.append("/* ]]> */");
 			sb.append("</script>");