diff --git a/packages/dart/lib/src/objects/parse_file.dart b/packages/dart/lib/src/objects/parse_file.dart
index 35ed5c8fd..008ef0118 100644
--- a/packages/dart/lib/src/objects/parse_file.dart
+++ b/packages/dart/lib/src/objects/parse_file.dart
@@ -71,6 +71,8 @@ class ParseFile extends ParseFileBase {
     final Map<String, String> headers = <String, String>{
       HttpHeaders.contentTypeHeader:
           mime(file!.path) ?? 'application/octet-stream',
+      HttpHeaders.contentLengthHeader:
+          file!.lengthSync() ?? '0',
     };
     try {
       final String uri = ParseCoreData().serverUrl + '$_path';