diff --git a/lib/src/platform_check/node_crypto.dart b/lib/src/platform_check/node_crypto.dart
index b4e9bd57..5f798a87 100644
--- a/lib/src/platform_check/node_crypto.dart
+++ b/lib/src/platform_check/node_crypto.dart
@@ -12,6 +12,6 @@ external JSObject require(String id);
 class NodeCrypto {
   static JSAny randomFillSync(JSAny buf) {
     final crypto = require('crypto');
-    return crypto.callMethod('randomFillSync'.toJS, [buf].toJS);
+    return crypto.callMethod('randomFillSync'.toJS, buf);
   }
 }
diff --git a/lib/src/platform_check/web.dart b/lib/src/platform_check/web.dart
index 4e49c2af..59ef673f 100644
--- a/lib/src/platform_check/web.dart
+++ b/lib/src/platform_check/web.dart
@@ -57,7 +57,7 @@ class _JsNodeEntropySource implements EntropySource {
   @override
   Uint8List getBytes(int len) {
     var list = Uint8List(len);
-    NodeCrypto.randomFillSync(list.toJS);
+    NodeCrypto.randomFillSync(list.buffer.toJS);
     return list;
   }
 }