1 files changed, 15 insertions, 13 deletions
diff --git a/ext/node/polyfills/_zlib_binding.mjs b/ext/node/polyfills/_zlib_binding.mjs
index 729af9b35..118f9edc4 100644
--- a/ext/node/polyfills/_zlib_binding.mjs
+++ b/ext/node/polyfills/_zlib_binding.mjs
@@ -50,8 +50,8 @@ import {
   op_zlib_new,
   op_zlib_reset,
   op_zlib_write,
-  op_zlib_write_async,
 } from "ext:core/ops";
+import process from "node:process";
 
 const writeResult = new Uint32Array(2);
 
@@ -124,18 +124,20 @@ class Zlib {
     out_off,
     out_len,
   ) {
-    op_zlib_write_async(
-      this.#handle,
-      flush ?? Z_NO_FLUSH,
-      input,
-      in_off,
-      in_len,
-      out,
-      out_off,
-      out_len,
-    ).then(([err, availOut, availIn]) => {
-      if (this.#checkError(err)) {
-        this.callback(availIn, availOut);
+    process.nextTick(() => {
+      const res = this.writeSync(
+        flush ?? Z_NO_FLUSH,
+        input,
+        in_off,
+        in_len,
+        out,
+        out_off,
+        out_len,
+      );
+
+      if (res) {
+        const [availOut, availIn] = res;
+        this.callback(availOut, availIn);
       }
     });