diff --git a/public/js/icinga/behavior/tooltip.js b/public/js/icinga/behavior/tooltip.js
index 98cc1ff59..abc1d4952 100644
--- a/public/js/icinga/behavior/tooltip.js
+++ b/public/js/icinga/behavior/tooltip.js
@@ -21,7 +21,7 @@
     };
 
     Tooltip.prototype.onRendered = function(evt) {
-        var self = evt.data.self, icinga = evt.data.icinga, el = evt.target;
+        var _this = evt.data.self, icinga = evt.data.icinga, el = evt.target;
 
         $('[title]', el).each(function () {
             var $el = $(this);
@@ -63,7 +63,7 @@
                 return;
             }
             var title = $(this).find('.tipsy-inner').html();
-            var atMouse = document.elementFromPoint(self.mouseX, self.mouseY);
+            var atMouse = document.elementFromPoint(_this.mouseX, _this.mouseY);
             var nearestTip = $(atMouse).closest('[original-title="' + title + '"]')[0];
             if (nearestTip) {
                 var tipsy = $.data(nearestTip, 'tipsy');
diff --git a/public/js/icinga/behavior/tristate.js b/public/js/icinga/behavior/tristate.js
index 88c07102d..77dad14e1 100644
--- a/public/js/icinga/behavior/tristate.js
+++ b/public/js/icinga/behavior/tristate.js
@@ -13,7 +13,7 @@
     Tristate.prototype = new Icinga.EventListener();
 
     Tristate.prototype.clickTriState = function (event) {
-        var self = event.data.self;
+        var _this = event.data.self;
         var $tristate = $(this);
         var triState  = parseInt($tristate.data('icinga-tristate'), 10);
 
@@ -42,7 +42,7 @@
         } else {
             $tristate.parent().find('b.tristate-changed').css('visibility', 'hidden');
         }
-        self.icinga.ui.setTriState(value.toString(), $tristate);
+        _this.icinga.ui.setTriState(value.toString(), $tristate);
     };
 
     Icinga.Behaviors.Tristate = Tristate;