diff --git a/doc/build-unix.md b/doc/build-unix.md
index 46dc585058..f119aed8c2 100644
--- a/doc/build-unix.md
+++ b/doc/build-unix.md
@@ -52,7 +52,7 @@ Dependency Build Instructions: Ubuntu & Debian
 Build requirements:
 
 	sudo apt-get install build-essential
-	sudo apt-get install libtool autotools-dev autoconf
+	sudo apt-get install libtool autotools-dev autoconf automake
 	sudo apt-get install libssl-dev
 
 for Ubuntu 12.04 and later: