diff --git a/lib/server/server.js b/lib/server/server.js
index c007e82906..911e064870 100644
--- a/lib/server/server.js
+++ b/lib/server/server.js
@@ -230,7 +230,8 @@ function execute(port) {
 
     let Doc;
     if (
-      metadata.layout && siteConfig.layouts &&
+      metadata.layout &&
+      siteConfig.layouts &&
       siteConfig.layouts[metadata.layout]
     ) {
       Doc = siteConfig.layouts[metadata.layout]({