diff --git a/lib/spoon/windows.rb b/lib/spoon/windows.rb
index ef7d2b5..a69a2e1 100644
--- a/lib/spoon/windows.rb
+++ b/lib/spoon/windows.rb
@@ -16,6 +16,7 @@
 
 module Spoon
   P_NOWAIT = 1
+  extend FFI::Library
   
   attach_function :_spawnve, [:int, :string, :pointer, :pointer], :int
   attach_function :_spawnvpe, [:int, :string, :pointer, :pointer], :int