diff --git a/api/models/indiening.py b/api/models/indiening.py
index 3d1dc624..ca72f2b6 100644
--- a/api/models/indiening.py
+++ b/api/models/indiening.py
@@ -77,13 +77,14 @@ def save(self, *args, **kwargs):
 
         if "temp" in self.bestand.name:
             old_file = self.bestand
-            new_path = self.bestand.name.replace(
+            old_file_name = old_file.name
+            new_path = old_file.name.replace(
                 "temp", f"indiening_{self.indiening_id}"
             )
             default_storage.save(new_path, ContentFile(old_file.read()))
             self.bestand.name = new_path
             super(Indiening, self).save(*args, **kwargs)
-            old_file.storage.delete(old_file.name)
+            default_storage.delete(old_file_name)
         else:
             super(Indiening, self).save(*args, **kwargs)