diff --git a/aiogram/dispatcher/filters/builtin.py b/aiogram/dispatcher/filters/builtin.py
index 5fe01dde..62527e2b 100644
--- a/aiogram/dispatcher/filters/builtin.py
+++ b/aiogram/dispatcher/filters/builtin.py
@@ -656,7 +656,7 @@ class AdminFilter(Filter):
                 message = obj.message
             else:
                 return False
-            if ChatType.is_private(message):  # there is no admin in private chats
+            if message.chat.type == ChatType.PRIVATE:  # there is no admin in private chats
                 return False
             chat_ids = [message.chat.id]
         else:
diff --git a/aiogram/types/message.py b/aiogram/types/message.py
index ddbccde6..b4166e79 100644
--- a/aiogram/types/message.py
+++ b/aiogram/types/message.py
@@ -234,7 +234,7 @@ class Message(base.TelegramObject):
 
         :return: str
         """
-        if ChatType.is_private(self.chat):
+        if self.chat.type == ChatType.PRIVATE:
             raise TypeError('Invalid chat type!')
 
         url = 'https://t.me/'