diff --git a/plugins/CuraDrive/src/RestoreBackupJob.py b/plugins/CuraDrive/src/RestoreBackupJob.py
index e26e55fd37..33ca115c06 100644
--- a/plugins/CuraDrive/src/RestoreBackupJob.py
+++ b/plugins/CuraDrive/src/RestoreBackupJob.py
@@ -36,8 +36,11 @@ class RestoreBackupJob(Job):
 
     def run(self) -> None:
 
+        url = self._backup.get("download_url")
+        assert url is not None
+
         HttpRequestManager.getInstance().get(
-            url = self._backup.get("download_url"),
+            url =url,
             callback = self._onRestoreRequestCompleted,
             error_callback = self._onRestoreRequestCompleted
         )