diff --git a/boot.php b/boot.php
index 963f5c454a..2242ba476d 100644
--- a/boot.php
+++ b/boot.php
@@ -553,6 +553,7 @@ class App {
 		$this->performance["rendering"] = 0;
 		$this->performance["parser"] = 0;
 		$this->performance["marktime"] = 0;
+		$this->performance["markstart"] = microtime(true);
 
 		$this->callstack["database"] = array();
 		$this->callstack["network"] = array();