diff --git a/src/PIL/BlpImagePlugin.py b/src/PIL/BlpImagePlugin.py
index 2d03af9d7dd..6569782d09e 100644
--- a/src/PIL/BlpImagePlugin.py
+++ b/src/PIL/BlpImagePlugin.py
@@ -371,11 +371,9 @@ def _decode_jpeg_stream(self) -> None:
         image = JpegImageFile(BytesIO(data))
         Image._decompression_bomb_check(image.size)
         if image.mode == "CMYK":
-            decoder_name, extents, offset, args = image.tile[0]
+            args = image.tile[0].args
             assert isinstance(args, tuple)
-            image.tile = [
-                ImageFile._Tile(decoder_name, extents, offset, (args[0], "CMYK"))
-            ]
+            image.tile = [image.tile[0]._replace(args=(args[0], "CMYK"))]
         r, g, b = image.convert("RGB").split()
         reversed_image = Image.merge("RGB", (b, g, r))
         self.set_as_raw(reversed_image.tobytes())