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-rw-r--r--lib/action_cable/channel/base.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/action_cable/channel/base.rb b/lib/action_cable/channel/base.rb
index c8292be183..0b9aa2f4ad 100644
--- a/lib/action_cable/channel/base.rb
+++ b/lib/action_cable/channel/base.rb
@@ -73,7 +73,7 @@ module ActionCable
include Naming
include Broadcasting
- SUBSCRIPTION_CONFIRMATION_INTERNAL_MESSAGE = 'confirm_subscription'
+ SUBSCRIPTION_CONFIRMATION_INTERNAL_MESSAGE = 'confirm_subscription'.freeze
on_subscribe :subscribed
on_unsubscribe :unsubscribed