diff --git a/kfet/static/kfet/js/history.js b/kfet/static/kfet/js/history.js
index da96dce7..6493bb5c 100644
--- a/kfet/static/kfet/js/history.js
+++ b/kfet/static/kfet/js/history.js
@@ -74,13 +74,14 @@ class History {
         if (this.lock == 1)
             return false;
         this.lock = 1;
+        var that = this;
 
         if (window.kpsul) {
-            var on_success = kpsul.env.coolReset;
+            var on_success = kpsul._env.coolReset;
             var focus_next = kpsul.account_manager._$input_trigramme;
         } else {
             var on_success = () => this._$container.find('.ui-selected')
-                                               .removeClass('.ui-selected) ;
+                                               .removeClass('.ui-selected') ;
             var focus_next = undefined;
         }
 
@@ -99,7 +100,7 @@ class History {
         })
         .done(function(data) {
             on_success();
-            this.lock = 0;
+            that.lock = 0;
         })
         .fail(function($xhr) {
             var data = $xhr.responseJSON;
@@ -113,7 +114,7 @@ class History {
                     displayErrors(getErrorsHtml(data));
                     break;
             }
-            this.lock = 0;
+            that.lock = 0;
         });
     }