diff --git a/src/PIL/ImageFile.py b/src/PIL/ImageFile.py
index aac961a76..34f344f1d 100644
--- a/src/PIL/ImageFile.py
+++ b/src/PIL/ImageFile.py
@@ -231,7 +231,7 @@ class ImageFile(Image.Image):
                     decoder.setimage(self.im, extents)
                     if decoder.pulls_fd:
                         decoder.setfd(self.fp)
-                        status, err_code = decoder.decode(b"")
+                        err_code = decoder.decode(b"")[1]
                     else:
                         b = prefix
                         while True: