diff --git a/activerecord/activerecord.gemspec b/activerecord/activerecord.gemspec
index 8484e1093e..8f4c957dbd 100644
--- a/activerecord/activerecord.gemspec
+++ b/activerecord/activerecord.gemspec
@@ -22,5 +22,4 @@ Gem::Specification.new do |s|
   s.add_dependency('activesupport', version)
   s.add_dependency('activemodel',   version)
   s.add_dependency('arel',          '~> 3.0.0')
-  s.add_dependency('tzinfo',        '~> 0.3.29')
 end
diff --git a/activesupport/activesupport.gemspec b/activesupport/activesupport.gemspec
index 61a88bd65b..3c2402c136 100644
--- a/activesupport/activesupport.gemspec
+++ b/activesupport/activesupport.gemspec
@@ -20,4 +20,5 @@ Gem::Specification.new do |s|
 
   s.add_dependency('i18n',       '~> 0.6')
   s.add_dependency('multi_json', '~> 1.0')
+  s.add_dependency('tzinfo',     '~> 0.3.29')
 end