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-rw-r--r--activesupport/lib/active_support/ordered_hash.rb2
1 files changed, 2 insertions, 0 deletions
diff --git a/activesupport/lib/active_support/ordered_hash.rb b/activesupport/lib/active_support/ordered_hash.rb
index 6723805d32..57ead35827 100644
--- a/activesupport/lib/active_support/ordered_hash.rb
+++ b/activesupport/lib/active_support/ordered_hash.rb
@@ -1,3 +1,5 @@
+require 'yaml'
+
# OrderedHash is namespaced to prevent conflicts with other implementations
module ActiveSupport
# Hash is ordered in Ruby 1.9!