--- src/tkobjc/Pixmap.m.orig	2003-06-22 10:57:34.000000000 -0500
+++ src/tkobjc/Pixmap.m	2012-09-24 09:18:26.000000000 -0500
@@ -103,7 +103,7 @@
       png_destroy_read_struct (&read_ptr, NULL, NULL);
       raiseEvent (PixmapError, "Could not create PNG info struct");
     }
-  if (setjmp (read_ptr->jmpbuf))
+  if (setjmp (png_jmpbuf (read_ptr)))
     {
       png_destroy_read_struct (&read_ptr, &read_info_ptr, (png_infopp)NULL);
       fclose (fp);
--- src/tkobjc/internal.m.orig	2007-06-17 01:15:30.000000000 -0500
+++ src/tkobjc/internal.m	2012-09-24 09:18:15.000000000 -0500
@@ -1666,7 +1666,7 @@
       raiseEvent (PixmapError, "Could not create PNG info struct\n");
     }
   
-  if (setjmp (png_ptr->jmpbuf))
+  if (setjmp (png_jmpbuf (png_ptr)))
     {
       png_destroy_write_struct (&png_ptr, &info_ptr);
       fclose (fp);