1 files changed, 16 insertions, 2 deletions
diff --git a/runtime/js/90_deno_ns.js b/runtime/js/90_deno_ns.js
index a957ce004..72ba0c8d1 100644
--- a/runtime/js/90_deno_ns.js
+++ b/runtime/js/90_deno_ns.js
@@ -140,8 +140,22 @@ const denoNs = {
     );
     return io.readSync(rid, buffer);
   },
-  write: io.write,
-  writeSync: io.writeSync,
+  write(rid, data) {
+    internals.warnOnDeprecatedApi(
+      "Deno.write()",
+      new Error().stack,
+      "Use `writer.write()` instead.",
+    );
+    return io.write(rid, data);
+  },
+  writeSync(rid, data) {
+    internals.warnOnDeprecatedApi(
+      "Deno.writeSync()",
+      new Error().stack,
+      "Use `writer.writeSync()` instead.",
+    );
+    return io.writeSync(rid, data);
+  },
   File: fs.File,
   FsFile,
   open: fs.open,