diff --git a/IPython/html/static/services/sessions/js/session.js b/IPython/html/static/services/sessions/js/session.js
index 0a2f587..a2bf694 100644
--- a/IPython/html/static/services/sessions/js/session.js
+++ b/IPython/html/static/services/sessions/js/session.js
@@ -75,6 +75,7 @@ var IPython = (function (IPython) {
             type : "DELETE",
             dataType : "json",
         };
+        this.kernel.running = false;
         var url = utils.url_path_join(this._baseProjectUrl, 'api/sessions', this.id);
         $.ajax(url, settings);
     };