diff --git a/arduino-ide-extension/src/browser/sketch-factory.ts b/arduino-ide-extension/src/browser/sketch-factory.ts
index 364c0d6b..2a50aa61 100644
--- a/arduino-ide-extension/src/browser/sketch-factory.ts
+++ b/arduino-ide-extension/src/browser/sketch-factory.ts
@@ -51,7 +51,7 @@ void loop() {
 }
 `                   });
             const location = new URL(window.location.href);
-            location.searchParams.set('sketch', sketchFile.toString());
+            location.searchParams.set('sketch', sketchDir.toString());
             const hash = await this.fileSystem.getFsPath(sketchDir.toString());
             if (hash) {
                 location.hash = hash;