diff --git a/README.md b/README.md
index ec14577..00e6c7a 100644
--- a/README.md
+++ b/README.md
@@ -27,6 +27,7 @@ If you have not cloned this repository locally; clone the git repository locally
 ```bash
 git clone --recursive https://github.com/pine64/blisp.git
 cd blisp
+git submodule update --init --recursive
 ```
 
 ## Build the library and command line utility