diff --git a/demos/MMk.rb b/demos/MMk.rb
index ccbb71223dc94ac8fda179eb14caa0f6e73ed2fc..6f9cbfea59014b4d41fdaa10cad525d96af3aa18 100644
--- a/demos/MMk.rb
+++ b/demos/MMk.rb
@@ -1,7 +1,7 @@
 #!/usr/bin/env ruby
 
 require 'rubygems' if RUBY_VERSION =~ /^1\.8/
-require 'simplekit'
+require_relative '../lib/simplekit'
 
 # Demonstration model of an M/M/k queueing system.  There are k servers
 # and both the arrival and service processes are memoryless (exponential).
diff --git a/demos/MyModelArgs.rb b/demos/MyModelArgs.rb
index 170bfd526a7e77195714d5dd8783b56d5c98a0e7..f868bea49b162a65dc46541e852ce3fdf77fcae0 100644
--- a/demos/MyModelArgs.rb
+++ b/demos/MyModelArgs.rb
@@ -1,7 +1,7 @@
 #!/usr/bin/env ruby
 
 require 'rubygems' if RUBY_VERSION =~ /^1\.8/
-require 'simplekit'
+require_relative '../lib/simplekit'
 
 class MyModel
   include SimpleKit