1 files changed, 16 insertions, 2 deletions
diff --git a/runtime/js/90_deno_ns.js b/runtime/js/90_deno_ns.js
index 7ef807140..452c62725 100644
--- a/runtime/js/90_deno_ns.js
+++ b/runtime/js/90_deno_ns.js
@@ -127,8 +127,22 @@ const denoNs = {
   },
   fstatSync: fs.fstatSync,
   fstat: fs.fstat,
-  fsyncSync: fs.fsyncSync,
-  fsync: fs.fsync,
+  fsyncSync(rid) {
+    internals.warnOnDeprecatedApi(
+      "Deno.fsyncSync()",
+      new Error().stack,
+      "Use `Deno.FsFile.syncSync()` instead.",
+    );
+    fs.fsyncSync(rid);
+  },
+  async fsync(rid) {
+    internals.warnOnDeprecatedApi(
+      "Deno.fsync()",
+      new Error().stack,
+      "Use `Deno.FsFile.sync()` instead.",
+    );
+    await fs.fsync(rid);
+  },
   fdatasyncSync: fs.fdatasyncSync,
   fdatasync: fs.fdatasync,
   symlink: fs.symlink,