diff --git a/src/vs/platform/userDataSync/common/userDataSyncStoreService.ts b/src/vs/platform/userDataSync/common/userDataSyncStoreService.ts
index 49d4d4c5c8d14288e03d8b540c7e2b071083ffed..11a94759668dab27a8d7a2e23a7ba23bb85ec5ef 100644
--- a/src/vs/platform/userDataSync/common/userDataSyncStoreService.ts
+++ b/src/vs/platform/userDataSync/common/userDataSyncStoreService.ts
@@ -49,6 +49,9 @@ export class UserDataSyncStoreService extends Disposable implements IUserDataSyn
 					'X-Client-Version': productService.version,
 					'X-Machine-Id': uuid
 				};
+				if (productService.commit) {
+					headers['X-Client-Commit'] = productService.commit;
+				}
 				return headers;
 			});
 	}