diff --git a/game/persistency.py b/game/persistency.py
index 303b3cfb..a7bebe24 100644
--- a/game/persistency.py
+++ b/game/persistency.py
@@ -21,10 +21,12 @@ def base_path() -> str:
 
 
 def _temporary_save_file() -> str:
+    assert _dcs_saved_game_folder
     return os.path.join(_dcs_saved_game_folder, "tmpsave.liberation")
 
 
 def _autosave_path() -> str:
+    assert _dcs_saved_game_folder
     return os.path.join(_dcs_saved_game_folder, "autosave.liberation")