diff --git a/onadata/libs/utils/viewer_tools.py b/onadata/libs/utils/viewer_tools.py
index faf55bd3f..8ba9076e6 100644
--- a/onadata/libs/utils/viewer_tools.py
+++ b/onadata/libs/utils/viewer_tools.py
@@ -193,10 +193,9 @@ def no_seeking(*a, **kw):
             # The default, file-system storage won't allow changing the `seek`
             # attribute, which is fine because seeking on local files works
             # perfectly anyway
-            storage_class = get_storage_class()
-            if not issubclass(storage_class, FileSystemStorage):
+            if not isinstance(default_storage, FileSystemStorage):
                 logging.warning(
-                    f'{storage_class} may not be a local storage class, but '
+                    f'{default_storage.__class__} may not be a local storage class, but '
                     f'disabling seeking failed: {e}'
                 )