diff --git a/README.md b/README.md
index 5af60c0..16e2c68 100644
--- a/README.md
+++ b/README.md
@@ -17,6 +17,13 @@ Install a couple of Rubies
     single_user_rvm::install_ruby { 'ruby-1.9.3-p392': user => 'username' }
     single_user_rvm::install_ruby { 'ruby-2.0.0-p247': user => 'username' }
 
+Set the default ruby
+--------------------
+
+    single_user_rvm::default {'ruby-1.9.3': user => 'username' }
+
+ruby-1.9.3 is a grep match on the output of rvm current
+
 More info in [install_ruby.pp](manifests/install_ruby.pp)
 
 License
diff --git a/manifests/default.pp b/manifests/default.pp
new file mode 100644
index 0000000..95b0be2
--- /dev/null
+++ b/manifests/default.pp
@@ -0,0 +1,47 @@
+# == Define: single_user_rvm::default
+#
+# Sets the default RVM ruby
+#
+# # === Parameters
+#
+# # [*ruby_string*]
+#   Ruby version to install, be sure to use the full Ruby string as failing to do so will break the mechanism that
+#   detects if the required ruby is already installed. Defaults to the value of the title string.
+#   Should match a ruby installed by single_user_rvm::install_ruby
+#
+# [*user*]
+#   The user for which this Ruby will be installed. Defaults to 'rvm'.
+#
+# === Examples
+#
+# Set Ruby 2.0.0 p247 as default for user 'dude':
+#
+#   single_user_rvm::default { 'ruby-2.0.0-p247':
+#     user => 'dude',
+#   }
+#
+define single_user_rvm::default (
+  $user ='rvm') {
+
+    if $home {
+      $homedir = $home
+      } else {
+      $homedir = "/home/${user}"
+      }
+      
+    
+      $command =  "rvm use --default ${title}"
+      $check_command = "rvm current"
+
+    exec { "su -l ${user} -c '${command}'":
+      path => "/usr/bin:/usr/sbin:/bin:~/.rvm/bin",
+      provider => shell,
+      logoutput => false,
+      cwd => "/home/${user}",
+      require => Single_user_rvm::Install[$user],
+      unless => "su -l ${user} -c '${check_command}' | grep ${title}"
+    }
+
+
+    }
+