diff --git a/readme.md b/readme.md
index d91fc64..99ea3c9 100644
--- a/readme.md
+++ b/readme.md
@@ -102,7 +102,7 @@ They are not even released to users. Maybe they are some kinds of internal test
 
 ## How to use this project? Or how to use CMake to build OpenSSL?
 
-Just typical CMake procedure will work.
+Just typical CMake procedure will work. See [Mapping.md](Mapping.md) for argument mapping for OpenSSL original build parameters and CMake one.
 
 ## TODOs