diff --git a/arduino-ide-extension/src/node/core-service-impl.ts b/arduino-ide-extension/src/node/core-service-impl.ts
index a5f55218..2f014ca6 100644
--- a/arduino-ide-extension/src/node/core-service-impl.ts
+++ b/arduino-ide-extension/src/node/core-service-impl.ts
@@ -76,10 +76,11 @@ export class CoreServiceImpl implements CoreService {
 
         console.log('upload', options);
         const { uri } = options;
-        const sketchpath = await this.fileSystem.getFsPath(options.uri);
-        if (!sketchpath) {
+        const sketchFilePath = await this.fileSystem.getFsPath(options.uri);
+        if (!sketchFilePath) {
             throw new Error(`Cannot resolve filesystem path for URI: ${uri}.`);
         }
+        const sketchpath = path.dirname(sketchFilePath);
 
         const currentBoard = await this.boardsService.getSelectBoard();
         if (!currentBoard) {