diff --git a/rbackup/hierarchy/hierarchy.py b/rbackup/hierarchy/hierarchy.py
index 268a485..d3033e2 100644
--- a/rbackup/hierarchy/hierarchy.py
+++ b/rbackup/hierarchy/hierarchy.py
@@ -46,7 +46,7 @@ class Hierarchy:
         PosixPath('backup')
 
         :param dest: the root directory of the backup hierarchy
-        :type dest: str, path-like object
+        :type dest: str or path-like object
         """
         try:
             self._path = Path(dest)