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-rw-r--r--actionmailer/lib/action_mailer/base.rb2
1 files changed, 2 insertions, 0 deletions
diff --git a/actionmailer/lib/action_mailer/base.rb b/actionmailer/lib/action_mailer/base.rb
index 6f8ae05539..5723b2cc1b 100644
--- a/actionmailer/lib/action_mailer/base.rb
+++ b/actionmailer/lib/action_mailer/base.rb
@@ -373,6 +373,8 @@ module ActionMailer
include AbstractController::AssetPaths
include AbstractController::Callbacks
+ include ActionView::Layouts
+
PROTECTED_IVARS = AbstractController::Rendering::DEFAULT_PROTECTED_INSTANCE_VARIABLES + [:@_action_has_layout]
def _protected_ivars # :nodoc: