diff --git a/packages/vant/src/dialog/Dialog.tsx b/packages/vant/src/dialog/Dialog.tsx
index 3d872e2a6..f9900f162 100644
--- a/packages/vant/src/dialog/Dialog.tsx
+++ b/packages/vant/src/dialog/Dialog.tsx
@@ -170,8 +170,9 @@ export default defineComponent({
     };
 
     const renderContent = () => {
-      if (slots.default) {
-        return <div class={bem('content')}>{slots.default()}</div>;
+      const defaultSlot = slots.default?.();
+      if (defaultSlot) {
+        return <div class={bem("content")}>{defaultSlot}</div>;
       }
 
       const { title, message, allowHtml } = props;