diff --git a/app/models/skipped_email_log.rb b/app/models/skipped_email_log.rb
index ee07aac8dcc..dea77b69327 100644
--- a/app/models/skipped_email_log.rb
+++ b/app/models/skipped_email_log.rb
@@ -12,7 +12,7 @@ class SkippedEmailLog < ActiveRecord::Base
   validate :ensure_valid_reason_type
 
   def self.reason_types
-    Enum.new(
+    @types ||= Enum.new(
       custom: 1,
       exceeded_emails_limit: 2,
       exceeded_bounces_limit: 3,