diff --git a/README.md b/README.md
index 634b40a..8d5f1cd 100644
--- a/README.md
+++ b/README.md
@@ -5,6 +5,8 @@
 
 TIFF decoding and encoding library in pure Rust
 
+Forked from https://github.com/image-rs/image-tiff. Changes: read images containing RGBPalette frames, ignoring colormaps.
+
 ## Supported
 
 ### Features