diff --git a/lib/internal/fs/utils.js b/lib/internal/fs/utils.js
index 9f5ad9bf5f6c0e..6e2ae69555130d 100644
--- a/lib/internal/fs/utils.js
+++ b/lib/internal/fs/utils.js
@@ -497,10 +497,6 @@ function Stats(dev, mode, nlink, uid, gid, rdev, blksize,
 ObjectSetPrototypeOf(Stats.prototype, StatsBase.prototype);
 ObjectSetPrototypeOf(Stats, StatsBase);
 
-// HACK: Workaround for https://github.com/standard-things/esm/issues/821.
-// TODO(ronag): Remove this as soon as `esm` publishes a fixed version.
-Stats.prototype.isFile = StatsBase.prototype.isFile;
-
 Stats.prototype._checkModeProperty = function(property) {
   if (isWindows && (property === S_IFIFO || property === S_IFBLK ||
     property === S_IFSOCK)) {