diff --git a/README.md b/README.md
index 2d386864..19af9996 100644
--- a/README.md
+++ b/README.md
@@ -116,10 +116,10 @@ $ export PKG_CONFIG=/Library/Frameworks/Mono.framework/Versions/Current/bin/pkg-
 $ export PKG_CONFIG_PATH=/Library/Frameworks/Mono.framework/Versions/Current/lib/pkgconfig
 ```
 
-Install <tt>git</tt>, <tt>automake</tt>, and <tt>intltool</tt> using <tt>MacPorts</tt>:
+Install <tt>git</tt>, <tt>automake</tt>, <tt>libtool</tt> and <tt>intltool</tt> using <tt>MacPorts</tt>:
 
 ```bash
-$ sudo port install git-core automake intltool
+$ sudo port install git-core automake intltool libtool
 ```
    
 Start the first part of the build: