diff --git a/public/js/icinga/loader.js b/public/js/icinga/loader.js
index e146fc7c5..4b420a6b5 100644
--- a/public/js/icinga/loader.js
+++ b/public/js/icinga/loader.js
@@ -1127,7 +1127,7 @@
             $.each(_this.icinga.behaviors, function(name, behavior) {
                 if (behavior.renderHook) {
                     var changed = behavior.renderHook(content, $container, action, autorefresh);
-                    if (!changed) {
+                    if (changed === null) {
                         discard = true;
                     } else {
                         content = changed;