diff --git a/docker/models/containers.py b/docker/models/containers.py
index 32676bb85..a9c46d1fa 100644
--- a/docker/models/containers.py
+++ b/docker/models/containers.py
@@ -153,7 +153,10 @@ def diff(self):
 
         Returns:
             (list) A list of dictionaries containing the attributes `Path`
-                and `Kind`.
+                and `Kind`:
+                    ``0``: Modified ("C")
+                    ``1``: Added ("A")
+                    ``2``: Deleted ("D")
 
         Raises:
             :py:class:`docker.errors.APIError`