diff --git a/core/event.class.php b/core/event.class.php
index 351fa8a4..7135637a 100644
--- a/core/event.class.php
+++ b/core/event.class.php
@@ -4,5 +4,10 @@
  * generic parent class
  */
 class Event {
+	var $_live = true;
+
+	public function veto() {
+		$this->_live = false;
+	}
 }
 ?>
diff --git a/core/util.inc.php b/core/util.inc.php
index 5fb34873..ab68df3f 100644
--- a/core/util.inc.php
+++ b/core/util.inc.php
@@ -330,6 +330,7 @@ function send_event($event) {
 	ksort($my_event_listeners);
 	foreach($my_event_listeners as $listener) {
 		$listener->receive_event($event);
+		if(!$event->_live) break;
 	}
 }