diff --git a/packages/vscode/src/fill/environmentService.ts b/packages/vscode/src/fill/environmentService.ts
index 7e5fa0ad..048db1e3 100644
--- a/packages/vscode/src/fill/environmentService.ts
+++ b/packages/vscode/src/fill/environmentService.ts
@@ -9,5 +9,5 @@ export class EnvironmentService extends environment.EnvironmentService {
 
 }
 
-// @ts-ignore
-environment.EnvironmentService = EnvironmentService;
+const target = environment as typeof environment;
+target.EnvironmentService = EnvironmentService;