Imported from libpng-1.0.6.tar
diff --git a/scripts/pngos2.def b/scripts/pngos2.def
index c3ff7f5..0c0316d 100644
--- a/scripts/pngos2.def
+++ b/scripts/pngos2.def
@@ -31,6 +31,7 @@
   png_set_bgr
   png_set_gray_to_rgb
   png_set_rgb_to_gray
+  png_set_rgb_to_gray_fixed
   png_set_rows
   png_build_grayscale_palette
   png_set_strip_alpha
@@ -131,8 +132,10 @@
   png_set_bKGD
   png_get_cHRM
   png_set_cHRM
+  png_set_cHRM_fixed
   png_get_gAMA
   png_set_gAMA
+  png_set_gAMA_fixed
   png_get_hIST
   png_set_hIST
   png_get_IHDR