diff --git a/telebot/types.py b/telebot/types.py
index 513921fbd..bb2ab22fc 100644
--- a/telebot/types.py
+++ b/telebot/types.py
@@ -2892,7 +2892,7 @@ def __init__(self, keyboard=None, row_width=3):
         self.row_width: int = row_width
         self.keyboard: List[List[InlineKeyboardButton]] = keyboard or []
 
-    def add(self, *args, row_width=None) -> 'InlineKeyboardMarkup':
+    def add(self, *args: InlineKeyboardButton, row_width: Optional[int] = None) -> 'InlineKeyboardMarkup':
         """
         This method adds buttons to the keyboard without exceeding row_width.