diff --git a/README b/README
index bcc20a5..0d02a05 100644
--- a/README
+++ b/README
@@ -41,8 +41,8 @@ This will create a directory 'yubico-pam'.  Enter the directory:
 
   cd yubico-pam
 
-Autoconf and automake must be installed.  For the documentation,
-asciidoc and docbook are also required.
+Autoconf, automake and libtool must be installed.  For the
+documentation, asciidoc and docbook are also required.
 
 Generate the build system using: