diff --git a/docker/api/container.py b/docker/api/container.py
index 1f153eeb7..d1b870f9c 100644
--- a/docker/api/container.py
+++ b/docker/api/container.py
@@ -844,7 +844,7 @@ def logs(self, container, stdout=True, stderr=True, stream=False,
                 float (in fractional seconds)
 
         Returns:
-            (generator or str)
+            (generator of bytes or bytes)
 
         Raises:
             :py:class:`docker.errors.APIError`
diff --git a/docker/models/containers.py b/docker/models/containers.py
index 35d8b3141..4795523a1 100644
--- a/docker/models/containers.py
+++ b/docker/models/containers.py
@@ -313,7 +313,7 @@ def logs(self, **kwargs):
                 float (in nanoseconds)
 
         Returns:
-            (generator or str): Logs from the container.
+            (generator of bytes or bytes): Logs from the container.
 
         Raises:
             :py:class:`docker.errors.APIError`