diff --git a/src/apptaskmanager.js b/src/apptaskmanager.js
index a4002111f..fb810e1ed 100644
--- a/src/apptaskmanager.js
+++ b/src/apptaskmanager.js
@@ -68,6 +68,7 @@ function scheduleTask(appId, taskId, callback) {
 
     if (!fs.existsSync(path.dirname(logFile))) safe.fs.mkdirSync(path.dirname(logFile)); // ensure directory
 
+    // TODO: set memory limit for app backup task
     tasks.startTask(taskId, { logFile, timeout: 20 * 60 * 60 * 1000 /* 20 hours */, nice: 15 }, function (error, result) {
         callback(error, result);