diff --git a/src/vs/code/electron-main/logUploader.ts b/src/vs/code/electron-main/logUploader.ts
index 795321e8600ec93c675edfaa1fec08cf781a25f7..bbcc8a6a76a62ef4b6b5aa2c2995a45aea652cf0 100644
--- a/src/vs/code/electron-main/logUploader.ts
+++ b/src/vs/code/electron-main/logUploader.ts
@@ -83,10 +83,9 @@ async function postLogs(
 		result = await requestService.request({
 			url: endpoint.url,
 			type: 'POST',
-			data: fs.createReadStream(outZip),
+			data: new Buffer(fs.readFileSync(outZip)).toString('base64'),
 			headers: {
-				'Content-Type': 'application/zip',
-				'Content-Length': fs.statSync(outZip).size
+				'Content-Type': 'application/zip'
 			}
 		});
 	} catch (e) {