diff --git a/packages/next/build/webpack-config.ts b/packages/next/build/webpack-config.ts
index cb9927a9d5da..a42abcae003e 100644
--- a/packages/next/build/webpack-config.ts
+++ b/packages/next/build/webpack-config.ts
@@ -1565,7 +1565,7 @@ export default async function getBaseWebpackConfig(
     },
   }
 
-  if (!isServer) {
+  if (targetWeb) {
     webpack5Config.output!.enabledLibraryTypes = ['assign']
   }