diff --git a/plugins/guests/gentoo/cap/change_host_name.rb b/plugins/guests/gentoo/cap/change_host_name.rb
index f1f08a55c..7d8ca3ac5 100644
--- a/plugins/guests/gentoo/cap/change_host_name.rb
+++ b/plugins/guests/gentoo/cap/change_host_name.rb
@@ -8,6 +8,8 @@ module VagrantPlugins
           if !comm.test("hostname -f | grep '^#{name}$'", sudo: false)
             basename = name.split(".", 2)[0]
             comm.sudo <<-EOH.gsub(/^ {14}/, "")
+              set -e
+
               # Set the hostname
               hostname '#{basename}'
               echo "hostname=#{basename}" > /etc/conf.d/hostname