diff --git a/README.markdown b/README.markdown
index 18fcb7da0..7855c204b 100644
--- a/README.markdown
+++ b/README.markdown
@@ -31,7 +31,7 @@ Urbit depends on:
 
 ####Ubuntu or Debian
 
-    sudo apt-get install libgmp3-dev libsigsegv-dev openssl libssl-dev libncurses5-dev git make exuberant-ctags automake autoconf libtool
+    sudo apt-get install libgmp3-dev libsigsegv-dev openssl libssl-dev libncurses5-dev git make exuberant-ctags automake autoconf libtool g++
 
 ####Fedora