diff --git a/requests/sessions.py b/requests/sessions.py
index 36a760dd..982e96f1 100644
--- a/requests/sessions.py
+++ b/requests/sessions.py
@@ -316,7 +316,7 @@ class Session(SessionRedirectMixin):
         """Sends a POST request. Returns :class:`Response` object.
 
         :param url: URL for the new :class:`Request` object.
-        :param data: (optional) Dictionary or bytes to send in the body of the :class:`Request`.
+        :param data: (optional) Dictionary, bytes, or file-like object to send in the body of the :class:`Request`.
         :param \*\*kwargs: Optional arguments that ``request`` takes.
         """
 
@@ -326,7 +326,7 @@ class Session(SessionRedirectMixin):
         """Sends a PUT request. Returns :class:`Response` object.
 
         :param url: URL for the new :class:`Request` object.
-        :param data: (optional) Dictionary or bytes to send in the body of the :class:`Request`.
+        :param data: (optional) Dictionary, bytes, or file-like object to send in the body of the :class:`Request`.
         :param \*\*kwargs: Optional arguments that ``request`` takes.
         """
 
@@ -336,7 +336,7 @@ class Session(SessionRedirectMixin):
         """Sends a PATCH request. Returns :class:`Response` object.
 
         :param url: URL for the new :class:`Request` object.
-        :param data: (optional) Dictionary or bytes to send in the body of the :class:`Request`.
+        :param data: (optional) Dictionary, bytes, or file-like object to send in the body of the :class:`Request`.
         :param \*\*kwargs: Optional arguments that ``request`` takes.
         """