diff --git a/flutter_ffi_plugin/bin/src/config.dart b/flutter_ffi_plugin/bin/src/config.dart
index 1ce18098..2992e5af 100644
--- a/flutter_ffi_plugin/bin/src/config.dart
+++ b/flutter_ffi_plugin/bin/src/config.dart
@@ -45,7 +45,8 @@ class RinfConfigMessage {
     return '''message:
     $KEY_INPUT_DIR: $inputDir
     $KEY_RUST_OUTPUT_DIR: $rustOutputDir
-    $KEY_DART_OUTPUT_DIR: $dartOutputDir''';
+    $KEY_DART_OUTPUT_DIR: $dartOutputDir
+    $KEY_RUST_SERDE: $rustSerde''';
   }
 
   static const KEY_INPUT_DIR = "input_dir";