diff --git a/.prettierignore b/.prettierignore
index 6fb929e8e8..7fc9d8c186 100644
--- a/.prettierignore
+++ b/.prettierignore
@@ -11,3 +11,4 @@ test/snapshots-no-hmr
 test/js/deno/*.test.ts
 test/js/deno/**/*.test.ts
 bench/react-hello-world/react-hello-world.node.js
+src/bun.js/builtins/WebCoreJSBuiltins.d.ts