--- a/INSTALL.Ubuntu	Wed Feb 09 15:26:58 2011 +0900
+++ b/INSTALL.Ubuntu	Wed Feb 09 18:08:54 2011 +0900
@@ -17,7 +17,9 @@
 ============================================
 
 The following packages are required to compile freeDiameter from source:
- cmake make gcc flex bison libsctp1 libsctp-dev libgnutls-dev libgcrypt-dev
+ cmake make gcc flex bison libsctp1 libsctp-dev libgnutls-dev libgcrypt-dev libidn11-dev
+ 
+(note that libidn and libsctp can be avoided by defining DISABLE_SCTP and DIAMID_IDNA_REJECT)
  
 Additionnaly, these ones may be useful:
  mercurial gdb
@@ -42,7 +44,7 @@
 the following commands should generate the freeDiameter packages for you:
 
 # Install the dependencies for building the source:
-sudo apt-get -y install mercurial cmake make gcc bison flex libsctp-dev libgnutls-dev libgcrypt-dev ssl-cert debhelper fakeroot \
+sudo apt-get -y install mercurial cmake make gcc bison flex libsctp-dev libgnutls-dev libgcrypt-dev libidn11-dev ssl-cert debhelper fakeroot \
    libpq-dev libmysqlclient-dev libxml2-dev swig python-dev
 
 # Retrieve the latest version of the source package
@@ -83,7 +85,7 @@
 Step by step instructions without using the debhelper tools:
 
 1) Install all packages dependencies
-# sudo apt-get install mercurial cmake make gcc bison flex libsctp-dev libgnutls-dev libgcrypt-dev
+# sudo apt-get install mercurial cmake make gcc bison flex libsctp-dev libgnutls-dev libgcrypt-dev libidn11-dev
 
 2) (OPTION) If you will compile modules that require postgresql, also install:
 # sudo apt-get install libpq-dev