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-rw-r--r--activerecord/lib/active_record/migration.rb2
1 files changed, 2 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/migration.rb b/activerecord/lib/active_record/migration.rb
index ea9950de08..640111096d 100644
--- a/activerecord/lib/active_record/migration.rb
+++ b/activerecord/lib/active_record/migration.rb
@@ -1,3 +1,5 @@
+require "active_support/core_ext/array/wrap"
+
module ActiveRecord
# Exception that can be raised to stop migrations from going backwards.
class IrreversibleMigration < ActiveRecordError