diff --git a/src/Bridges/HttpTracy/SessionPanel.php b/src/Bridges/HttpTracy/SessionPanel.php
index 9c9cf6d1..31aeb230 100644
--- a/src/Bridges/HttpTracy/SessionPanel.php
+++ b/src/Bridges/HttpTracy/SessionPanel.php
@@ -23,7 +23,7 @@ class SessionPanel extends Nette\Object implements Tracy\IBarPanel
 	 */
 	public function getTab()
 	{
-		ob_start(NULL, 0, PHP_OUTPUT_HANDLER_REMOVABLE);
+		ob_start();
 		require __DIR__ . '/templates/SessionPanel.tab.phtml';
 		return ob_get_clean();
 	}
@@ -35,7 +35,7 @@ public function getTab()
 	 */
 	public function getPanel()
 	{
-		ob_start(NULL, 0, PHP_OUTPUT_HANDLER_REMOVABLE);
+		ob_start();
 		require __DIR__ . '/templates/SessionPanel.panel.phtml';
 		return ob_get_clean();
 	}