diff --git a/packages/flutter_tools/lib/src/build_system/targets/web.dart b/packages/flutter_tools/lib/src/build_system/targets/web.dart
index f9c240f34b0..d3423e73808 100644
--- a/packages/flutter_tools/lib/src/build_system/targets/web.dart
+++ b/packages/flutter_tools/lib/src/build_system/targets/web.dart
@@ -231,6 +231,7 @@ class Dart2JSTarget extends Dart2WebTarget {
   @override
   List<String> get buildFiles => <String>[
     'main.dart.js',
+    if (compilerConfig.sourceMaps) 'main.dart.js.map',
   ];
 }
 
diff --git a/packages/flutter_tools/test/general.shard/build_system/targets/web_test.dart b/packages/flutter_tools/test/general.shard/build_system/targets/web_test.dart
index 4b39bf6e48d..46c4e1cc7bc 100644
--- a/packages/flutter_tools/test/general.shard/build_system/targets/web_test.dart
+++ b/packages/flutter_tools/test/general.shard/build_system/targets/web_test.dart
@@ -182,6 +182,7 @@ void main() {
     webResources.childFile('foo.txt')
       .writeAsStringSync('A');
     environment.buildDir.childFile('main.dart.js').createSync();
+    environment.buildDir.childFile('main.dart.js.map').createSync();
 
     await WebReleaseBundle(<WebCompilerConfig>[
         const JsCompilerConfig()
@@ -191,6 +192,8 @@ void main() {
       .readAsStringSync(), 'A');
     expect(environment.outputDir.childFile('main.dart.js')
       .existsSync(), true);
+    expect(environment.outputDir.childFile('main.dart.js.map')
+      .existsSync(), true);
     expect(environment.outputDir.childDirectory('assets')
       .childFile('AssetManifest.bin.json').existsSync(), true);