diff --git a/extensions/typescript-language-features/src/typescriptService.ts b/extensions/typescript-language-features/src/typescriptService.ts
index cd2d50e93ea..3b5a139cd0a 100644
--- a/extensions/typescript-language-features/src/typescriptService.ts
+++ b/extensions/typescript-language-features/src/typescriptService.ts
@@ -21,7 +21,7 @@ export namespace ServerResponse {
 		) { }
 	}
 
-	export const NoContent = new class { readonly type = 'noContent'; };
+	export const NoContent = { type: 'noContent' } as const;
 
 	export type Response<T extends Proto.Response> = T | Cancelled | typeof NoContent;
 }
diff --git a/extensions/typescript-language-features/src/typescriptServiceClient.ts b/extensions/typescript-language-features/src/typescriptServiceClient.ts
index bb640ad80d3..3ff0d709091 100644
--- a/extensions/typescript-language-features/src/typescriptServiceClient.ts
+++ b/extensions/typescript-language-features/src/typescriptServiceClient.ts
@@ -47,7 +47,7 @@ namespace ServerState {
 		Errored
 	}
 
-	export const None = new class { readonly type = Type.None; };
+	export const None = { type: Type.None } as const;
 
 	export class Running {
 		readonly type = Type.Running;
diff --git a/src/vs/editor/contrib/codeAction/codeActionModel.ts b/src/vs/editor/contrib/codeAction/codeActionModel.ts
index 54a1946ca0d..39faf3722d1 100644
--- a/src/vs/editor/contrib/codeAction/codeActionModel.ts
+++ b/src/vs/editor/contrib/codeAction/codeActionModel.ts
@@ -141,7 +141,7 @@ export namespace CodeActionsState {
 		Triggered,
 	}
 
-	export const Empty = new class { readonly type = Type.Empty; };
+	export const Empty = { type: Type.Empty } as const;
 
 	export class Triggered {
 		readonly type = Type.Triggered;
diff --git a/src/vs/editor/contrib/codeAction/lightBulbWidget.ts b/src/vs/editor/contrib/codeAction/lightBulbWidget.ts
index 505f13244f9..0fc03b3a8ba 100644
--- a/src/vs/editor/contrib/codeAction/lightBulbWidget.ts
+++ b/src/vs/editor/contrib/codeAction/lightBulbWidget.ts
@@ -25,7 +25,7 @@ namespace LightBulbState {
 		Showing,
 	}
 
-	export const Hidden = new class { readonly type = Type.Hidden; };
+	export const Hidden = { type: Type.Hidden } as const;
 
 	export class Showing {
 		readonly type = Type.Showing;
diff --git a/src/vs/editor/contrib/parameterHints/parameterHintsModel.ts b/src/vs/editor/contrib/parameterHints/parameterHintsModel.ts
index 7ff13c6182c..b285d1f7665 100644
--- a/src/vs/editor/contrib/parameterHints/parameterHintsModel.ts
+++ b/src/vs/editor/contrib/parameterHints/parameterHintsModel.ts
@@ -26,7 +26,7 @@ namespace ParameterHintState {
 		Pending,
 	}
 
-	export const Default = new class { readonly type = Type.Default; };
+	export const Default = { type: Type.Default } as const;
 
 	export class Pending {
 		readonly type = Type.Pending;
diff --git a/src/vs/workbench/services/progress/browser/progressIndicator.ts b/src/vs/workbench/services/progress/browser/progressIndicator.ts
index 5d605ce2c08..ff1da4bab76 100644
--- a/src/vs/workbench/services/progress/browser/progressIndicator.ts
+++ b/src/vs/workbench/services/progress/browser/progressIndicator.ts
@@ -117,9 +117,9 @@ namespace ProgressIndicatorState {
 		Work
 	}
 
-	export const None = new class { readonly type = Type.None; };
-	export const Done = new class { readonly type = Type.Done; };
-	export const Infinite = new class { readonly type = Type.Infinite; };
+	export const None = { type: Type.None } as const;
+	export const Done = { type: Type.Done } as const;
+	export const Infinite = { type: Type.Infinite } as const;
 
 	export class While {
 		readonly type = Type.While;