diff --git a/telethon/client/messages.py b/telethon/client/messages.py
index e472b47d..64d34ca4 100644
--- a/telethon/client/messages.py
+++ b/telethon/client/messages.py
@@ -709,7 +709,7 @@ class MessageMethods:
                 Width/height and dimensions/size ratios may be important.
                 For Telegram to accept a thumbnail, you must provide the
                 dimensions of the underlying media through ``attributes=``
-                with :tl:`DocumentAttributesVideo` or by installing the
+                with :tl:`DocumentAttributeVideo` or by installing the
                 optional ``hachoir`` dependency.
 
             force_document (`bool`, optional):
@@ -1154,7 +1154,7 @@ class MessageMethods:
                 Width/height and dimensions/size ratios may be important.
                 For Telegram to accept a thumbnail, you must provide the
                 dimensions of the underlying media through ``attributes=``
-                with :tl:`DocumentAttributesVideo` or by installing the
+                with :tl:`DocumentAttributeVideo` or by installing the
                 optional ``hachoir`` dependency.
 
             force_document (`bool`, optional):
diff --git a/telethon/client/uploads.py b/telethon/client/uploads.py
index 9844369b..28e791e1 100644
--- a/telethon/client/uploads.py
+++ b/telethon/client/uploads.py
@@ -247,7 +247,7 @@ class UploadMethods:
                 Width/height and dimensions/size ratios may be important.
                 For Telegram to accept a thumbnail, you must provide the
                 dimensions of the underlying media through ``attributes=``
-                with :tl:`DocumentAttributesVideo` or by installing the
+                with :tl:`DocumentAttributeVideo` or by installing the
                 optional ``hachoir`` dependency.