diff --git a/mobx_codegen/lib/version.dart b/mobx_codegen/lib/version.dart
index bc245f3f..26dc6bd5 100644
--- a/mobx_codegen/lib/version.dart
+++ b/mobx_codegen/lib/version.dart
@@ -1,4 +1,4 @@
 // Generated via set_version.dart. !!!DO NOT MODIFY BY HAND!!!
 
 /// The current version as per `pubspec.yaml`.
-const version = '2.5.0';
+const version = '2.6.0';
diff --git a/mobx_codegen/test/data/valid_keep_alive_computed_output.dart b/mobx_codegen/test/data/valid_keep_alive_computed_output.dart
index db55bce9..576726c4 100644
--- a/mobx_codegen/test/data/valid_keep_alive_computed_output.dart
+++ b/mobx_codegen/test/data/valid_keep_alive_computed_output.dart
@@ -16,10 +16,14 @@ mixin _$TestStore on _TestStore, Store {
     return super.username;
   }
 
+  bool _usernameIsInitialized = false;
+
   @override
   set username(String value) {
-    _$usernameAtom.reportWrite(value, super.username, () {
+    _$usernameAtom
+        .reportWrite(value, _usernameIsInitialized ? super.username : null, () {
       super.username = value;
+      _usernameIsInitialized = true;
     });
   }
 }