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-rw-r--r--activemodel/lib/active_model/translation.rb2
1 files changed, 2 insertions, 0 deletions
diff --git a/activemodel/lib/active_model/translation.rb b/activemodel/lib/active_model/translation.rb
index 2ad8ca9dea..42ca463f82 100644
--- a/activemodel/lib/active_model/translation.rb
+++ b/activemodel/lib/active_model/translation.rb
@@ -1,3 +1,5 @@
+require 'active_support/core_ext/hash/reverse_merge'
+
module ActiveModel
module Translation
include ActiveModel::Naming