diff --git a/aiogram/dispatcher/filters/builtin.py b/aiogram/dispatcher/filters/builtin.py
index fcaaf786..20317f57 100644
--- a/aiogram/dispatcher/filters/builtin.py
+++ b/aiogram/dispatcher/filters/builtin.py
@@ -673,7 +673,7 @@ 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 fedd656e..52c2b3a8 100644
--- a/aiogram/types/message.py
+++ b/aiogram/types/message.py
@@ -236,9 +236,8 @@ class Message(base.TelegramObject):
 
         :return: str
         """
-        if ChatType.is_private(self.chat):
-            raise TypeError("Invalid chat type!")
-
+        if self.chat.type == ChatType.PRIVATE:
+            raise TypeError('Invalid chat type
         url = "https://t.me/"
         if self.chat.username:
             # Generates public link