Index: lib/profile.rb
===================================================================
--- lib/profile.rb	(revision 17725)
+++ lib/profile.rb	(working copy)
@@ -1,6 +1,6 @@
 require 'profiler'
 
-VM::InstructionSequence.compile_option = {
+RubyVM::InstructionSequence.compile_option = {
   :trace_instruction => true,
   :specialized_instruction => false
 }