diff --git a/README.md b/README.md
index b3b9c21..785d3aa 100644
--- a/README.md
+++ b/README.md
@@ -7,3 +7,12 @@ To use the program you should first run it with --help or -h to see an usage gui
 This will tell you how to use the program.
 Note that this is a cross platform program.
 I have tested it with GNU/Linux and compiled it for windows and tested that with wine.
+
+When you have error on compile with
+===================================
+
+`savePng.c undefined reference to png_create_write_struct`
+
+I think you can see the message when you compile this converter on ubuntu machine.
+If you so, unzip `libpng12.tar` to `/usr/lib/` on ubuntu directory.
+and use `convert` binary file to convert .raw to .png file.
diff --git a/convert_ubuntu b/convert_ubuntu
new file mode 100644
index 0000000..f9126fd
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diff --git a/libpng12.tar b/libpng12.tar
new file mode 100644
index 0000000..13dcea3
Binary files /dev/null and b/libpng12.tar differ