diff --git a/plugins/guests/ubuntu/guest.rb b/plugins/guests/ubuntu/guest.rb
index ed4311cea..3d95d1c79 100644
--- a/plugins/guests/ubuntu/guest.rb
+++ b/plugins/guests/ubuntu/guest.rb
@@ -26,7 +26,7 @@ module VagrantPlugins
 
       def change_host_name(name)
         vm.communicate.tap do |comm|
-          if !comm.test("sudo hostname | grep '#{name}'")
+          if !comm.test("sudo hostname | grep '^#{name}$'")
             comm.sudo("sed -i 's/.*$/#{name}/' /etc/hostname")
             comm.sudo("sed -i 's@^\\(127[.]0[.]1[.]1[[:space:]]\\+\\)@\\1#{name} #{name.split('.')[0]} @' /etc/hosts")
             comm.sudo("service hostname start")