diff --git a/modules/luci-base/htdocs/luci-static/resources/cbi.js b/modules/luci-base/htdocs/luci-static/resources/cbi.js
index ff198027e3..f9b601995c 100644
--- a/modules/luci-base/htdocs/luci-static/resources/cbi.js
+++ b/modules/luci-base/htdocs/luci-static/resources/cbi.js
@@ -714,6 +714,9 @@ if (typeof(window.CustomEvent) !== 'function') {
 }
 
 function cbi_dropdown_init(sb) {
+	if (sb && L.dom.findClassInstance(sb) instanceof L.ui.Dropdown)
+		return;
+
 	var dl = new L.ui.Dropdown(sb, null, { name: sb.getAttribute('name') });
 	return dl.bind(sb);
 }