diff --git a/elements/noflo-main.html b/elements/noflo-main.html
index 5b0a2c9b4..b9ec20e2b 100644
--- a/elements/noflo-main.html
+++ b/elements/noflo-main.html
@@ -570,8 +570,7 @@ <h2>{{ label }}</h2>
         var dialog = document.createElement('noflo-new-runtime');
         dialog.addEventListener('addRuntime', function(event) {
           var runtime = event.detail;
-          this.userRuntimes.push(runtime);
-          this.runtimes.push(runtime);
+          this.fire('runtime', event.detail);
         }.bind(this));
         dialog.user = this.user;
         document.body.appendChild(dialog);