diff --git a/packages/next/types/global.d.ts b/packages/next/types/global.d.ts
index 56c6f92f3ebb974..cbaceebc3b11aa2 100644
--- a/packages/next/types/global.d.ts
+++ b/packages/next/types/global.d.ts
@@ -3,6 +3,9 @@
 // Extend the NodeJS namespace with Next.js-defined properties
 declare namespace NodeJS {
   interface Process {
+    /**
+     * @deprecated Use `typeof window` instead
+     */
     readonly browser: boolean
   }