diff --git a/pyrogram/enums/chat_event_action.py b/pyrogram/enums/chat_event_action.py
index eff86f37..921cb90d 100644
--- a/pyrogram/enums/chat_event_action.py
+++ b/pyrogram/enums/chat_event_action.py
@@ -123,6 +123,10 @@ class ChatEventAction(AutoName):
     MESSAGE_UNPINNED = auto()
     "a message has been unpinned (see ``unpinned_message``)"
 
+    MESSAGE_PIN_CHANGED = auto()
+    "a message has been pinned or unpinned but actual message is not received"
+    "should never be used in end-user code, only for correct parsing"
+
     CREATED_FORUM_TOPIC = auto()
     "a new forum topic has been created (see `created_forum_topic`)"
 
diff --git a/pyrogram/types/user_and_chats/chat_event.py b/pyrogram/types/user_and_chats/chat_event.py
index 9faea6a0..ef76e139 100644
--- a/pyrogram/types/user_and_chats/chat_event.py
+++ b/pyrogram/types/user_and_chats/chat_event.py
@@ -433,12 +433,14 @@ class ChatEvent(Object):
         elif isinstance(action, raw.types.ChannelAdminLogEventActionUpdatePinned):
             message = action.message
 
-            if message.pinned:
+            if isinstance(message, raw.types.Message) and message.pinned:
                 pinned_message = await types.Message._parse(client, message, users, chats)
                 action = enums.ChatEventAction.MESSAGE_PINNED
-            else:
+            elif isinstance(message, raw.types.Message) and not message.pinned:
                 unpinned_message = await types.Message._parse(client, message, users, chats)
                 action = enums.ChatEventAction.MESSAGE_UNPINNED
+            else:
+                action = enums.ChatEventAction.MESSAGE_PIN_CHANGED
 
         elif isinstance(action, raw.types.ChannelAdminLogEventActionExportedInviteEdit):
             old_invite_link = types.ChatInviteLink._parse(client, action.prev_invite, users)