diff --git a/src/node/plugin.ts b/src/node/plugin.ts
index a76e84db..ffd08f8f 100644
--- a/src/node/plugin.ts
+++ b/src/node/plugin.ts
@@ -273,5 +273,5 @@ export function createVitePressPlugin(
     }
   }
 
-  return [vitePressPlugin, vuePlugin, ...(userViteConfig.plugins || [])]
+  return [vitePressPlugin, vuePlugin, ...(userViteConfig?.plugins || []) as Plugin[]]
 }