diff --git a/plugins/guests/linux/cap/mount_virtualbox_shared_folder.rb b/plugins/guests/linux/cap/mount_virtualbox_shared_folder.rb
index c557097e6..78984eec4 100644
--- a/plugins/guests/linux/cap/mount_virtualbox_shared_folder.rb
+++ b/plugins/guests/linux/cap/mount_virtualbox_shared_folder.rb
@@ -64,7 +64,7 @@ module VagrantPlugins
 
           # Chown the directory to the proper user. We skip this if the
           # mount options contained a readonly flag, because it won't work.
-          if !opts[:mount_options].include?("ro")
+          if options[:mount_options] and !options[:mount_options].include?("ro")
             chown_commands = []
             chown_commands << "chown #{mount_uid}:#{mount_gid} #{expanded_guest_path}"
             chown_commands << "chown #{mount_uid}:#{mount_gid_old} #{expanded_guest_path}"