diff --git a/README.rdoc b/README.rdoc
index 1a403b1..78ab4f8 100644
--- a/README.rdoc
+++ b/README.rdoc
@@ -44,6 +44,16 @@ while binaries for libxslt and libexslt areprovided in the
 libxslt-ruby bindings.
 
 
+Installation from source:
+
+ruby ext/libxslt/extconf.rb
+make
+sudo make install
+
+gem build libxslt-ruby.gemspec
+gem install libxslt-ruby-1.1.1.gem
+
+
 == USAGE
 
 For in-depth information about using libxslt-ruby please refer
diff --git a/libxslt-ruby.gemspec b/libxslt-ruby.gemspec
index e821967..87de130 100644
--- a/libxslt-ruby.gemspec
+++ b/libxslt-ruby.gemspec
@@ -1,4 +1,5 @@
 # encoding: utf-8
+require 'date'
 
 # Determine the current version of the software
 version = File.read('ext/libxslt/version.h').match(/\s*RUBY_LIBXSLT_VERSION\s*['"](\d.+)['"]/)[1]