diff --git a/CHANGELOG.md b/CHANGELOG.md
index dd730a9d1..e3424c102 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,7 @@
  - Fix SSH `exec!` to inherit proper `$PATH`. [GH-426]
  - Chef client now accepts an empty (`nil`) run list again. [GH-429]
  - Fix incorrect error message when running `provision` on halted VM. [GH-447]
+ - Checking guest addition versions now ignores OSE. [GH-438]
 
 ## 0.8.2 (July 22, 2011)
 
diff --git a/lib/vagrant/action/vm/check_guest_additions.rb b/lib/vagrant/action/vm/check_guest_additions.rb
index 5a053647e..9d8e3931d 100644
--- a/lib/vagrant/action/vm/check_guest_additions.rb
+++ b/lib/vagrant/action/vm/check_guest_additions.rb
@@ -15,10 +15,15 @@ module Vagrant
           version = env["vm"].vm.interface.get_guest_property_value("/VirtualBox/GuestAdd/Version")
           if version.empty?
             env.ui.warn I18n.t("vagrant.actions.vm.check_guest_additions.not_detected")
-          elsif version != VirtualBox.version
-            env.ui.warn(I18n.t("vagrant.actions.vm.check_guest_additions.version_mismatch",
-                        :guest_version => version,
-                        :virtualbox_version => VirtualBox.version))
+          else
+            # Strip the -OSE/_OSE off from the guest additions
+            version = version.gsub(/[-_]ose/i, '')
+
+            if version != VirtualBox.version
+              env.ui.warn(I18n.t("vagrant.actions.vm.check_guest_additions.version_mismatch",
+                                 :guest_version => version,
+                                 :virtualbox_version => VirtualBox.version))
+            end
           end
 
           # Continue