diff --git a/packages/@vuepress/core/lib/client/components/Content.js b/packages/@vuepress/core/lib/client/components/Content.js
index 4e514de508..ce03278968 100644
--- a/packages/@vuepress/core/lib/client/components/Content.js
+++ b/packages/@vuepress/core/lib/client/components/Content.js
@@ -21,7 +21,7 @@ export default {
       Vue.component(pageKey, getPageAsyncComponent(pageKey))
     }
 
-    if (pageKey) {
+    if (Vue.component(pageKey)) {
       return h(pageKey)
     }
     return h('')