diff --git a/INSTALL.md b/INSTALL.md
index 9e89c8b3..3459a5c7 100644
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -7,6 +7,7 @@ Build dependencies:
 ```bash
 apt-get install build-essential libtool autotools-dev automake libconfig-dev ncurses-dev cmake checkinstall
 ```
+Note that `libconfig-dev` should be >= 1.4.
 
 You should get and install [libsodium](https://github.com/jedisct1/libsodium):
 ```bash