diff --git a/dart/lib/src/sentry_envelope_item.dart b/dart/lib/src/sentry_envelope_item.dart
index f88f808600..ce08fbb56d 100644
--- a/dart/lib/src/sentry_envelope_item.dart
+++ b/dart/lib/src/sentry_envelope_item.dart
@@ -97,6 +97,7 @@ class SentryEnvelopeItem {
 
       final newLine = utf8.encode('\n');
       final data = await dataFactory();
+      // TODO the data copy could be avoided - this would be most significant with attachments.
       return [...itemHeader, ...newLine, ...data];
     } catch (e) {
       return [];