diff --git a/sympy-png-decoder.patch b/sympy-png-decoder.patch
index a51871a..876cdb6 100644
--- a/sympy-png-decoder.patch
+++ b/sympy-png-decoder.patch
@@ -1,13 +1,12 @@
 --- sympy-sympy-1.7/sympy/printing/preview.py.orig	2020-11-29 04:02:22.000000000 -0700
 +++ sympy-sympy-1.7/sympy/printing/preview.py	2020-12-10 10:55:53.290413553 -0700
-@@ -32,8 +32,8 @@ def _run_pyglet(fname, fmt):
+@@ -32,8 +32,7 @@ def _run_pyglet(fname, fmt):
      from pyglet.window import key
  
      if fmt == "png":
 -        from pyglet.image.codecs.png import PNGImageDecoder
 -        img = image.load(fname, decoder=PNGImageDecoder())
-+        from pyglet.image.codecs.pil import PILImageDecoder
-+        img = image.load(fname, decoder=PILImageDecoder())
++        img = image.load(fname)
      else:
          raise ValueError("pyglet preview works only for 'png' files.")