diff --git a/lib/restore-utils/index.js b/lib/restore-utils/index.js
index 0c6ecb1..0dca94d 100644
--- a/lib/restore-utils/index.js
+++ b/lib/restore-utils/index.js
@@ -209,6 +209,9 @@ const restore = async (options = {}) => {
                         )
                       );
                       const success = await restoreBackedUpReport({ serverUrl: url, report: metadataReport });
+                      if (!(result in BACKUP_STATS)) {
+                        BACKUP_STATS[result] = [];
+                      }
                       if (success) BACKUP_STATS[result].push(id);
                       else BACKUP_STATS.failed.push(id);
                     }