diff --git a/lib/ui/icon.js b/lib/ui/icon.js
index 037dccf..56511a2 100644
--- a/lib/ui/icon.js
+++ b/lib/ui/icon.js
@@ -26,6 +26,7 @@ export function changeIcon(svg, type, id) {
 
 export function createIcon(type, id, style) {
     const svg = document.createElementNS(svgns, 'svg');
+    svg.classList.add('ui-icon');
     svg.appendChild(createUse(type, id));
     if (style != null) {
         for (let css of Object.entries(style)) {
@@ -38,6 +39,7 @@ export function createIcon(type, id, style) {
 export function resolveIcon(container) {
     const svgs = container.querySelectorAll('svg[data-id]');
     for (let icon of svgs) {
+        icon.classList.add('ui-icon');
         const type = icon.dataset.type;
         const id = icon.dataset.id;
         icon.replaceChildren(createUse(type, id));