diff --git a/weasel/util/filesystem.py b/weasel/util/filesystem.py
index 4729b84..87eab45 100644
--- a/weasel/util/filesystem.py
+++ b/weasel/util/filesystem.py
@@ -47,7 +47,7 @@ def force_remove(rmfunc, path, ex):
     try:
         shutil.rmtree(str(d), onerror=force_remove)
     except PermissionError as e:
-        warnings.warn(Warnings.W091.format(dir=d, msg=e))
+        warnings.warn(Warnings.W801.format(dir=d, msg=e))
 
 
 def is_cwd(path: Union[Path, str]) -> bool: