diff --git a/lib/capistrano/send/all.rb b/lib/capistrano/send/all.rb
index 4442207..aa77796 100644
--- a/lib/capistrano/send/all.rb
+++ b/lib/capistrano/send/all.rb
@@ -1,3 +1,5 @@
+require 'capistrano/send'
+
 require 'capistrano/send/mail'
 require 'capistrano/send/libnotify'
 require 'capistrano/send/notify-send'
diff --git a/lib/capistrano/send/libnotify.rb b/lib/capistrano/send/libnotify.rb
index 5060662..b0daf08 100644
--- a/lib/capistrano/send/libnotify.rb
+++ b/lib/capistrano/send/libnotify.rb
@@ -1,3 +1,5 @@
+require 'capistrano/send'
+
 begin
   require 'libnotify'
 rescue LoadError
diff --git a/lib/capistrano/send/mail.rb b/lib/capistrano/send/mail.rb
index a0b2482..183cacc 100644
--- a/lib/capistrano/send/mail.rb
+++ b/lib/capistrano/send/mail.rb
@@ -1,3 +1,5 @@
+require 'capistrano/send'
+
 begin
   require 'mail'
 rescue LoadError
diff --git a/lib/capistrano/send/notify-send.rb b/lib/capistrano/send/notify-send.rb
index 96f5192..d2720c1 100644
--- a/lib/capistrano/send/notify-send.rb
+++ b/lib/capistrano/send/notify-send.rb
@@ -1,3 +1,5 @@
+require 'capistrano/send'
+
 module Capistrano
   module Send
     module NotifySend