1 files changed, 4 insertions, 0 deletions
diff --git a/activesupport/lib/active_support/hash_with_indifferent_access.rb b/activesupport/lib/active_support/hash_with_indifferent_access.rb
index bdb8877f55..22cf401315 100644
--- a/activesupport/lib/active_support/hash_with_indifferent_access.rb
+++ b/activesupport/lib/active_support/hash_with_indifferent_access.rb
@@ -227,6 +227,10 @@ module ActiveSupport
     def deep_symbolize_keys; to_hash.deep_symbolize_keys end
     def to_options!; self end
 
+    def select(*args, &block)
+      dup.select!(*args, &block)
+    end
+
     # Convert to a regular hash with string keys.
     def to_hash
       _new_hash= {}