fix: only add cache tags when they're available

vercel · May 30, 2023 · f3d0754 · f3d0754
1 parent f32fe81
commit f3d0754
Showing 1 changed file with 5 additions and 3 deletions.
diff --git a/packages/next/src/server/base-server.ts b/packages/next/src/server/base-server.ts
@@ -1720,9 +1720,11 @@ export default abstract class Server<ServerOptions extends Options = Options> {
               return cacheEntry
             }
 
-            // The response headers here are immutable, but we can set it
-            // directly on the node response here instead.
-            res.setHeader('x-next-cache-tags', cacheTags)
+            if (cacheTags) {
+              // The response headers here are immutable, but we can set it
+              // directly on the node response here instead.
+              res.setHeader('x-next-cache-tags', cacheTags)
+            }
 
             // Send the response now that we have copied it into the cache.
             await sendResponse(req, res, response)