1 files changed, 3 insertions, 2 deletions
diff --git a/activesupport/lib/active_support/core_ext/hash/transform_values.rb b/activesupport/lib/active_support/core_ext/hash/transform_values.rb
index 7d507ac998..2f693bff0c 100644
--- a/activesupport/lib/active_support/core_ext/hash/transform_values.rb
+++ b/activesupport/lib/active_support/core_ext/hash/transform_values.rb
@@ -16,7 +16,7 @@ class Hash
       result[key] = yield(value)
     end
     result
-  end
+  end unless method_defined? :transform_values
 
   # Destructively converts all values using the +block+ operations.
   # Same as +transform_values+ but modifies +self+.
@@ -25,5 +25,6 @@ class Hash
     each do |key, value|
       self[key] = yield(value)
     end
-  end
+  end unless method_defined? :transform_values!
+  # TODO: Remove this file when supporting only Ruby 2.4+.
 end