diff --git a/src/text-editor-component.js b/src/text-editor-component.js
index c34a58dad..8bdca834f 100644
--- a/src/text-editor-component.js
+++ b/src/text-editor-component.js
@@ -4309,7 +4309,7 @@ class NodePool {
     }
 
     if (element) {
-      element.className = className
+      element.className = className || ''
       element.styleMap.forEach((value, key) => {
         if (!style || style[key] == null) element.style[key] = ''
       })