diff --git a/packages/next/src/build/webpack/loaders/next-metadata-route-loader.ts b/packages/next/src/build/webpack/loaders/next-metadata-route-loader.ts
index 7fb4f62792fe5..cb8f91b49f788 100644
--- a/packages/next/src/build/webpack/loaders/next-metadata-route-loader.ts
+++ b/packages/next/src/build/webpack/loaders/next-metadata-route-loader.ts
@@ -204,7 +204,11 @@ export async function GET(_, ctx) {
           throw new Error('id property is required for every item returned from generateSitemaps')
         }
       }
-      return item.id.toString() === targetId
+      let itemID = item.id.toString()
+      if(process.env.NODE_ENV === 'production') {
+        itemID += '.xml'
+      }
+      return itemID === targetId
     })?.id
     if (id == null) {
       return new NextResponse('Not Found', {