diff --git a/dwds/CHANGELOG.md b/dwds/CHANGELOG.md
index 9e71edb21..025cbdaa3 100644
--- a/dwds/CHANGELOG.md
+++ b/dwds/CHANGELOG.md
@@ -1,5 +1,7 @@
 ## 21.1.0-wip
 
+- Update the interface for ChromeProxyService.getSourceReport to match the VM service. - [#2235](https://github.com/dart-lang/webdev/pull/2235)
+
 ## 21.0.0
 
 - Update Dart SDK constraint to `>=3.2.0-36.0.dev <4.0.0`. - [#2207](https://github.com/dart-lang/webdev/pull/2207)
diff --git a/dwds/lib/src/services/chrome_proxy_service.dart b/dwds/lib/src/services/chrome_proxy_service.dart
index 422d1bcf6..44b4bfea4 100644
--- a/dwds/lib/src/services/chrome_proxy_service.dart
+++ b/dwds/lib/src/services/chrome_proxy_service.dart
@@ -803,6 +803,9 @@ ${globalLoadStrategy.loadModuleSnippet}("dart_sdk").developer.invokeExtension(
     bool? forceCompile,
     bool? reportLines,
     List<String>? libraryFilters,
+    // Note: Ignore the optional librariesAlreadyCompiled parameter. It is here
+    // to match the VM service interface.
+    List<String>? librariesAlreadyCompiled,
   }) =>
       wrapInErrorHandlerAsync(
         'getSourceReport',