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diff --git a/src/t4k_loaders.c b/src/t4k_loaders.c
index 7248e35..61fe63f 100644
--- a/src/t4k_loaders.c
+++ b/src/t4k_loaders.c
@@ -1028,12 +1028,9 @@ static int do_png_save(FILE * fi, const char *const fname, SDL_Surface * surf)
{
png_init_io(png_ptr, fi);
- info_ptr->width = surf->w;
- info_ptr->height = surf->h;
- info_ptr->bit_depth = 8;
- info_ptr->color_type = PNG_COLOR_TYPE_RGB_ALPHA;
- info_ptr->interlace_type = 1;
- info_ptr->valid = 0; /* will be updated by various png_set_FOO() functions */
+ png_set_IHDR(png_ptr, info_ptr, surf->w, surf->h, 8,
+ PNG_COLOR_TYPE_RGB_ALPHA, 1,
+ PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE);
png_set_sRGB_gAMA_and_cHRM(png_ptr, info_ptr,
PNG_sRGB_INTENT_PERCEPTUAL);
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