invalidoz

diff --git a/lib/albino.rb b/lib/albino.rb
index 387c8e9..b77d55e 100644
--- a/lib/albino.rb
+++ b/lib/albino.rb
@@ -1,4 +1,5 @@
 require 'posix-spawn'
+require 'rbconfig'
 
 ##
 # Wrapper for the Pygments command line tool, pygmentize.