diff --git a/packages/core/src/page/renderPageContent.ts b/packages/core/src/page/renderPageContent.ts
index c01a7a12767..eac8862ee78 100644
--- a/packages/core/src/page/renderPageContent.ts
+++ b/packages/core/src/page/renderPageContent.ts
@@ -74,6 +74,6 @@ export const renderPageContent = ({
       'frontmatter'
     ),
     sfcBlocks,
-    title: isString(frontmatter.title) ? frontmatter.title : title,
+    title: frontmatter.title ? `${frontmatter.title}` : title,
   }
 }