diff --git a/ext/ffi/README.md b/ext/ffi/README.md
index 00b17b36c53..e8aea5e67ea 100644
--- a/ext/ffi/README.md
+++ b/ext/ffi/README.md
@@ -299,3 +299,7 @@ sudo make install
 ### Real Usage
 
 FFI extension was used to implement [PHP TensorFlow binding](https://github.com/dstogov/php-tensorflow)
+
+### FFI Parser
+
+FFI C parser is generated using [LLK](https://github.com/dstogov/llk).