diff --git a/app/webroot/index.php b/app/webroot/index.php
index 0522c8281..690f31c8c 100644
--- a/app/webroot/index.php
+++ b/app/webroot/index.php
@@ -83,6 +83,6 @@
 		$Dispatcher->dispatch();
 	}
 	if (Configure::read() > 0) {
-		echo "<!-- " . round(getMicrotime() - $TIME_START, 4) . "s -->";
+		echo "<!-- " . round(microtime(true) - $TIME_START, 4) . "s -->";
 	}
 ?>
\ No newline at end of file