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-rw-r--r--activesupport/lib/active_support/values/time_zone.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/activesupport/lib/active_support/values/time_zone.rb b/activesupport/lib/active_support/values/time_zone.rb
index 1d87fa64b5..836f469df7 100644
--- a/activesupport/lib/active_support/values/time_zone.rb
+++ b/activesupport/lib/active_support/values/time_zone.rb
@@ -288,6 +288,7 @@ module ActiveSupport
# TODO: Preload instead of lazy load for thread safety
def tzinfo
+ require 'tzinfo' unless defined?(TZInfo)
@tzinfo ||= TZInfo::Timezone.get(MAPPING[name])
end