diff --git a/INSTALL.md b/INSTALL.md
index 114ef1775..ad81f40b9 100644
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -25,7 +25,7 @@ sudo swapon /swapfile
 # install build dependencies
 sudo apt-get install build-essential pkg-config libc6-dev m4 g++-multilib \
       autoconf libtool ncurses-dev unzip git python zlib1g-dev wget \
-      bsdmainutils automake curl unzip nano libsodium-dev
+      bsdmainutils automake curl unzip nano libsodium-dev cmake
 # clone git repo
 git clone https://git.hush.is/hush/hush3
 cd hush3