--- a/devtools/client/netmonitor/src/assets/styles/netmonitor.css
+++ b/devtools/client/netmonitor/src/assets/styles/netmonitor.css
@@ -1,12 +1,13 @@
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
+@import "chrome://devtools/skin/widgets.css";
 @import "resource://devtools/client/shared/components/splitter/split-box.css";
 @import "resource://devtools/client/shared/components/tree/tree-view.css";
 @import "resource://devtools/client/shared/components/tabs/tabs.css";
 @import "resource://devtools/client/shared/components/tabs/tabbar.css";
 @import "chrome://devtools/skin/components-frame.css";
 
 :root.theme-dark {
   --table-splitter-color: rgba(255,255,255,0.15);