diff --git a/pyrogram/crypto/mtproto.py b/pyrogram/crypto/mtproto.py
index b67b49f1..bbe9d27a 100644
--- a/pyrogram/crypto/mtproto.py
+++ b/pyrogram/crypto/mtproto.py
@@ -60,7 +60,16 @@ def unpack(b: BytesIO, session_id: bytes, auth_key: bytes, auth_key_id: bytes) -
     # https://core.telegram.org/mtproto/security_guidelines#checking-session-id
     assert data.read(8) == session_id
 
-    message = Message.read(data)
+    try:
+        message = Message.read(data)
+    except KeyError as e:
+        left = data.read().hex()
+
+        left = [left[i:i + 64] for i in range(0, len(left), 64)]
+        left = [[left[i:i + 8] for i in range(0, len(left), 8)] for left in left]
+        left = "\n".join(" ".join(x for x in left) for left in left)
+
+        raise ValueError(f"Unknown constructor found: {hex(e.args[0])}\n{left}")
 
     # https://core.telegram.org/mtproto/security_guidelines#checking-sha256-hash-value-of-msg-key
     # https://core.telegram.org/mtproto/security_guidelines#checking-message-length
diff --git a/pyrogram/raw/core/tl_object.py b/pyrogram/raw/core/tl_object.py
index db1d3bfc..3b87d72c 100644
--- a/pyrogram/raw/core/tl_object.py
+++ b/pyrogram/raw/core/tl_object.py
@@ -30,16 +30,7 @@ class TLObject:
 
     @classmethod
     def read(cls, data: BytesIO, *args: Any) -> Any:
-        try:
-            return cast(TLObject, objects[int.from_bytes(data.read(4), "little")]).read(data, *args)
-        except KeyError as e:
-            left = data.read().hex()
-
-            left = [left[i:i + 64] for i in range(0, len(left), 64)]
-            left = [[left[i:i + 8] for i in range(0, len(left), 8)] for left in left]
-            left = "\n".join(" ".join(x for x in left) for left in left)
-
-            raise ValueError(f"Unknown constructor found: {hex(e.args[0])}\n{left}")
+        return cast(TLObject, objects[int.from_bytes(data.read(4), "little")]).read(data, *args)
 
     def write(self, *args: Any) -> bytes:
         pass