--- glhack-1.2.orig/win/gl/gl_image.c
+++ glhack-1.2/win/gl/gl_image.c
@@ -486,7 +486,11 @@
   /* set error handling since we are using the setjmp/longjmp method
    * (this is the normal method of doing things with libpng).
    */
+#if PNG_LIBPNG_VER_MAJOR >= 1 && PNG_LIBPNG_VER_MINOR >= 4
+  if ( setjmp(png_jmpbuf(png_ptr)) )
+#else
   if (setjmp(png_ptr->jmpbuf))
+#endif
   {
     sdlgl_warning("Problem within LibPNG (unknown)\n");
     goto failed;