diff --git a/lib/src/ffi.dart b/lib/src/ffi.dart
index f7c8d36..f667520 100644
--- a/lib/src/ffi.dart
+++ b/lib/src/ffi.dart
@@ -27,14 +27,9 @@ abstract class JSRef {
     _refCount++;
   }
 
-  bool _released = false;
-
   void free() {
     _refCount--;
-    if (_refCount < 0 && !_released){
-      _released = true;
-      destroy();
-    }
+    if (_refCount < 0) destroy();
   }
 
   void destroy();
diff --git a/lib/src/object.dart b/lib/src/object.dart
index e939489..c81d311 100644
--- a/lib/src/object.dart
+++ b/lib/src/object.dart
@@ -150,12 +150,8 @@ class _JSObject extends JSRef {
 }
 
 /// JS function wrapper
-class _JSFunction extends _JSObject implements JSInvokable, _IsolateEncodable, Finalizable {
-  _JSFunction(Pointer<JSContext> ctx, Pointer<JSValue> val) : super(ctx, val) {
-    _finalizer.attach(this, this);
-  }
-
-  static final _finalizer = Finalizer<_JSFunction>((f) => f.free());
+class _JSFunction extends _JSObject implements JSInvokable, _IsolateEncodable {
+  _JSFunction(Pointer<JSContext> ctx, Pointer<JSValue> val) : super(ctx, val);
 
   @override
   invoke(List<dynamic> arguments, [dynamic thisVal]) {