diff --git a/kernel/fs/fs.go b/kernel/fs/fs.go
index 34cdf7e..3bd9a11 100644
--- a/kernel/fs/fs.go
+++ b/kernel/fs/fs.go
@@ -181,7 +181,7 @@ func (s *Service) read(this js.Value, args []js.Value) any {
 		// 	buf := make([]byte, length)
 		// 	n, err := StdinBuf.Read(buf)
 		// 	if err != nil {
-		// 		cb.Invoke(jsError(err))
+		// 		cb.Invoke(jsError(err), 0)
 		// 		return
 		// 	}
 		// 	js.CopyBytesToJS(jsbuf, buf[:n])
@@ -196,27 +196,27 @@ func (s *Service) read(this js.Value, args []js.Value) any {
 		f, ok := s.fds[fd]
 		s.mu.Unlock()
 		if !ok {
-			cb.Invoke(jsError(syscall.EBADF))
+			cb.Invoke(jsError(syscall.EBADF), 0)
 			return
 		}
 
 		if rs, ok := f.File.(io.ReadSeeker); ok && !pos.IsNull() {
 			_, err := rs.Seek(int64(pos.Int()), 0)
 			if err != nil {
-				cb.Invoke(jsError(err))
+				cb.Invoke(jsError(err), 0)
 				return
 			}
 		}
 
 		buf := make([]byte, length)
 		n, err := f.Read(buf)
-		if err != nil && err != io.EOF {
-			cb.Invoke(jsError(err))
-			return
-		}
 		if n > 0 {
 			js.CopyBytesToJS(jsbuf, buf[:n])
 		}
+		if err != nil && err != io.EOF {
+			cb.Invoke(jsError(err), n)
+			return
+		}
 
 		cb.Invoke(nil, n)
 	}()
diff --git a/kernel/web/lib/syscall.js b/kernel/web/lib/syscall.js
index a699d89..061dd40 100644
--- a/kernel/web/lib/syscall.js
+++ b/kernel/web/lib/syscall.js
@@ -58,12 +58,8 @@ globalThis.api = {
     // only significant signature change
     read(fd, bufsize, offset, length, position) {
       const buf = new Uint8Array(bufsize);
-      return new Promise((ok, err) => globalThis.fs.read(fd, buf, offset, length, position, (e) => {
-        if (e !== null) {
-          err(e);
-        } else {
-          ok(buf);
-        }
+      return new Promise(resolve => globalThis.fs.read(fd, buf, offset, length, position, (err, n) => {
+        resolve({err, buf, n});
       }));
     },
     readdir(path) { 
@@ -125,4 +121,4 @@ function cb(ok, err) {
 }
 
 
-//# sourceURL=syscall.js
\ No newline at end of file
+//# sourceURL=syscall.js
diff --git a/kernel/web/lib/wasm.js b/kernel/web/lib/wasm.js
index 1241f6d..7677ea7 100644
--- a/kernel/web/lib/wasm.js
+++ b/kernel/web/lib/wasm.js
@@ -132,10 +132,9 @@
         }
 				globalThis.sys.call("fs.read", [fd, buffer.length, offset, length, position])
 					.then(res => {
-						buffer.set(res.value);
-						callback(null, res.value.length);
-					})
-					.catch(err => callback(err));
+						buffer.set(res.value.buf);
+						callback(res.value.err, res.value.n);
+					});
       },
 			readdir(path, callback) {
 				globalThis.sys.call("fs.readdir", [path])
@@ -692,4 +691,4 @@
 		}
 	}
 })();
-//# sourceURL=wasm.js
\ No newline at end of file
+//# sourceURL=wasm.js