diff --git a/arduino-ide-extension/src/browser/workspace-service-ext-impl.ts b/arduino-ide-extension/src/browser/workspace-service-ext-impl.ts
index 225bd3f7..444317c0 100644
--- a/arduino-ide-extension/src/browser/workspace-service-ext-impl.ts
+++ b/arduino-ide-extension/src/browser/workspace-service-ext-impl.ts
@@ -1,5 +1,4 @@
 import { inject, injectable } from 'inversify';
-import { FileSystem } from '@theia/filesystem/lib/common';
 import { WorkspaceService } from '@theia/workspace/lib/browser/workspace-service';
 import { WorkspaceServiceExt } from './workspace-service-ext';
 
@@ -9,9 +8,6 @@ import { WorkspaceServiceExt } from './workspace-service-ext';
 @injectable()
 export class WorkspaceServiceExtImpl implements WorkspaceServiceExt {
 
-    @inject(FileSystem)
-    protected readonly fileSystem: FileSystem;
-
     @inject(WorkspaceService)
     protected readonly delegate: WorkspaceService;
 
@@ -20,4 +16,4 @@ export class WorkspaceServiceExtImpl implements WorkspaceServiceExt {
         return stats.map(stat => stat.uri);
     }
 
-}
+}
\ No newline at end of file