diff --git a/aiogram/types/inline_keyboard.py b/aiogram/types/inline_keyboard.py
index 8ba946e7..d3d28a74 100644
--- a/aiogram/types/inline_keyboard.py
+++ b/aiogram/types/inline_keyboard.py
@@ -88,7 +88,7 @@ class InlineKeyboardMarkup(base.TelegramObject):
 
     def __add__(self, other):
         return InlineKeyboardMarkup(
-            inline_keyboard=self.inline_keyboard,
+            inline_keyboard=self.inline_keyboard + other.keyboard,
             row_width=self.row_width,
             conf=self.conf,
             **self.other_kwargs