diff --git a/lib/server/server.js b/lib/server/server.js
index 227f1f0d6d..c007e82906 100644
--- a/lib/server/server.js
+++ b/lib/server/server.js
@@ -229,7 +229,10 @@ function execute(port) {
     const DocsLayout = require('../core/DocsLayout.js');
 
     let Doc;
-    if (metadata.layout && siteConfig.layouts[metadata.layout]) {
+    if (
+      metadata.layout && siteConfig.layouts &&
+      siteConfig.layouts[metadata.layout]
+    ) {
       Doc = siteConfig.layouts[metadata.layout]({
         React,
         MarkdownBlock: require('../core/MarkdownBlock.js'),