diff --git a/ext/node/polyfills/path/separator.ts b/ext/node/polyfills/path/separator.ts
index bb9eaf7bb4..4f438992be 100644
--- a/ext/node/polyfills/path/separator.ts
+++ b/ext/node/polyfills/path/separator.ts
@@ -1,9 +1,11 @@
 // Copyright 2018-2025 the Deno authors. MIT license.
 
-// TODO(petamoriken): enable prefer-primordials for node polyfills
-// deno-lint-ignore-file prefer-primordials
-
+import { primordials } from "ext:core/mod.js";
 import { isWindows } from "ext:deno_node/_util/os.ts";
 
+const { SafeRegExp } = primordials;
+
 export const SEP = isWindows ? "\\" : "/";
-export const SEP_PATTERN = isWindows ? /[\\/]+/ : /\/+/;
+export const SEP_PATTERN = isWindows
+  ? new SafeRegExp("[\\/]+")
+  : new SafeRegExp("\/+");