diff --git a/src/apps.js b/src/apps.js
index 306746e0f..d8251b299 100644
--- a/src/apps.js
+++ b/src/apps.js
@@ -621,6 +621,8 @@ function scheduleTask(appId, installationState, taskId, callback) {
         if (installationState === exports.ISTATE_PENDING_BACKUP || installationState === exports.ISTATE_PENDING_CLONE || installationState === exports.ISTATE_PENDING_RESTORE
             || installationState === exports.ISTATE_PENDING_IMPORT || installationState === exports.ISTATE_PENDING_UPDATE) {
             memoryLimit = 'memoryLimit' in backupConfig ? Math.max(backupConfig.memoryLimit/1024/1024, 400) : 400;
+        } else if (installationState === exports.ISTATE_PENDING_DATA_DIR_MIGRATION) {
+            memoryLimit = 1024; // cp takes more memory than we think
         }
 
         const options = { timeout: 20 * 60 * 60 * 1000 /* 20 hours */, nice: 15, memoryLimit };