diff --git a/frb_codegen/src/library/codegen/generator/api_dart/spec_generator/class/ty/enumeration_complex.rs b/frb_codegen/src/library/codegen/generator/api_dart/spec_generator/class/ty/enumeration_complex.rs
index 7d1d33a549..340d99100e 100644
--- a/frb_codegen/src/library/codegen/generator/api_dart/spec_generator/class/ty/enumeration_complex.rs
+++ b/frb_codegen/src/library/codegen/generator/api_dart/spec_generator/class/ty/enumeration_complex.rs
@@ -36,6 +36,9 @@ impl EnumRefApiDartGenerator<'_> {
         };
         let maybe_implements_exception =
             generate_dart_maybe_implements_exception(self.mir.is_exception);
+        let json_serde = format!(
+            "factory {name}.fromJson(Map<String, dynamic> json) => _${name}FromJson(json);",
+        );
 
         Some(ApiDartGeneratedClass {
             namespace: src.name.namespace.clone(),
@@ -47,6 +50,8 @@ impl EnumRefApiDartGenerator<'_> {
 
                     {variants}
 
+                    {json_serde}
+
                     {extra_body}
                 }}",
             ),
diff --git a/frb_codegen/src/library/codegen/generator/api_dart/text_generator.rs b/frb_codegen/src/library/codegen/generator/api_dart/text_generator.rs
index 2d917ce141..ea8c99c32d 100644
--- a/frb_codegen/src/library/codegen/generator/api_dart/text_generator.rs
+++ b/frb_codegen/src/library/codegen/generator/api_dart/text_generator.rs
@@ -92,7 +92,10 @@ fn generate_end_api_text(
             import: "import 'package:freezed_annotation/freezed_annotation.dart' hide protected;"
                 .into(),
             part: format!(
-                "part '{name}.freezed.dart';",
+                "
+                part '{name}.freezed.dart';
+                part '{name}.g.dart';
+                ",
                 name = dart_output_path.file_stem().unwrap().to_str().unwrap()
             ),
             ..Default::default()