diff --git a/packages/layout/src/DesignPlugins.vue b/packages/layout/src/DesignPlugins.vue
index 00b1c7678..20b1ae0ff 100644
--- a/packages/layout/src/DesignPlugins.vue
+++ b/packages/layout/src/DesignPlugins.vue
@@ -183,7 +183,7 @@ export default {
   left: var(--base-nav-panel-width);
   z-index: 999;
 
-  &.I18n {
+  &[class~='engine.plugins.i18n'] {
     width: auto;
   }