diff --git a/activesupport/lib/active_support/core_ext/time/zones.rb b/activesupport/lib/active_support/core_ext/time/zones.rb
index 0c5962858eb1e..dc632c2e5398a 100644
--- a/activesupport/lib/active_support/core_ext/time/zones.rb
+++ b/activesupport/lib/active_support/core_ext/time/zones.rb
@@ -1,4 +1,4 @@
-require 'active_support/time_with_zone'
+require 'active_support/core_ext/time/calculations'
 
 class Time
   class << self