diff --git a/README.md b/README.md
index f24858e3..090fcc76 100644
--- a/README.md
+++ b/README.md
@@ -93,7 +93,7 @@ Install autoconf and other basic development tools, python3 and pip.
 
 ##### Apt-based (debian, ubuntu, etc)
  - `sudo apt update`
- - `sudo apt install pkg-config python3-pip python3-venv`
+ - `sudo apt install pkg-config libffi-dev python3-pip python3-venv`
 
 ##### Android/Termux
  - install [Termux](https://termux.com/) (in Termux you can install packages via `pkg install <package-names>`)