diff --git a/lib/vagrant-parallels/synced_folder.rb b/lib/vagrant-parallels/synced_folder.rb
index 938f0a97..2e69a47f 100644
--- a/lib/vagrant-parallels/synced_folder.rb
+++ b/lib/vagrant-parallels/synced_folder.rb
@@ -105,7 +105,7 @@ def driver(machine)
       end
 
       def os_friendly_id(id)
-        id.gsub(/[\/:]/,'_').sub(/^_/, '')
+        id.gsub(/[\/:\\]/,'_').sub(/^_/, '')
       end
     end
   end