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-rw-r--r--ext/psych/lib/psych.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/ext/psych/lib/psych.rb b/ext/psych/lib/psych.rb
index 9b4b215b67..42cd8877be 100644
--- a/ext/psych/lib/psych.rb
+++ b/ext/psych/lib/psych.rb
@@ -8,6 +8,7 @@ require 'psych/omap'
require 'psych/set'
require 'psych/coder'
require 'psych/core_ext'
+require 'psych/deprecated'
###
# = Overview