diff --git a/packages/next/build/webpack-config.ts b/packages/next/build/webpack-config.ts
index bb73efb05c804..8a3e6331955ee 100644
--- a/packages/next/build/webpack-config.ts
+++ b/packages/next/build/webpack-config.ts
@@ -1724,8 +1724,15 @@ export default async function getBaseWebpackConfig(
     },
   }
 
+  if (!webpack5Config.output) {
+    webpack5Config.output = {}
+  }
+  if (isClient) {
+    webpack5Config.output.trustedTypes = 'nextjs#bundler'
+  }
+
   if (isClient || isEdgeServer) {
-    webpack5Config.output!.enabledLibraryTypes = ['assign']
+    webpack5Config.output.enabledLibraryTypes = ['assign']
   }
 
   if (dev) {