diff --git a/lib/mop.dart b/lib/mop.dart
index dd61dc4..55df1ec 100644
--- a/lib/mop.dart
+++ b/lib/mop.dart
@@ -634,7 +634,7 @@ class Mop {
   ///
   Future setActivityTransitionAnim(Anim anim) async {
     await _channel
-        .invokeMethod("setActivityTransitionAnim", {"anim": anim.name});
+        .invokeMethod("setActivityTransitionAnim", {"anim": ""});
     return;
   }