diff --git a/train-core.gemspec b/train-core.gemspec
index dcadfc87..9b9818c5 100644
--- a/train-core.gemspec
+++ b/train-core.gemspec
@@ -8,6 +8,7 @@ CORE_TRANSPORTS = [
   'lib/train/transports/mock.rb',
   'lib/train/transports/ssh.rb',
   'lib/train/transports/ssh_connection.rb',
+  'lib/train/transports/cisco_ios_connection.rb',
   'lib/train/transports/winrm.rb',
   'lib/train/transports/winrm_connection.rb',
 ].freeze