diff --git a/actionmailer/actionmailer.gemspec b/actionmailer/actionmailer.gemspec
index 2ae85f8b57..ee02cf6945 100644
--- a/actionmailer/actionmailer.gemspec
+++ b/actionmailer/actionmailer.gemspec
@@ -17,8 +17,6 @@
   s.require_path = 'lib'
   s.requirements << 'none'
 
-  s.has_rdoc = true
-
   s.add_dependency('actionpack',  version)
   s.add_dependency('mail',        '~> 2.2.15')
 end
diff --git a/actionpack/actionpack.gemspec b/actionpack/actionpack.gemspec
index 651f3b164a..6c55842eea 100644
--- a/actionpack/actionpack.gemspec
+++ b/actionpack/actionpack.gemspec
@@ -17,8 +17,6 @@
   s.require_path = 'lib'
   s.requirements << 'none'
 
-  s.has_rdoc = true
-
   s.add_dependency('activesupport',    version)
   s.add_dependency('activemodel',      version)
   s.add_dependency('rack-cache',       '~> 1.0.0')
diff --git a/activemodel/activemodel.gemspec b/activemodel/activemodel.gemspec
index fec9c7ff8b..9f80673bb8 100644
--- a/activemodel/activemodel.gemspec
+++ b/activemodel/activemodel.gemspec
@@ -17,8 +17,6 @@
   s.files        = Dir['CHANGELOG', 'MIT-LICENSE', 'README.rdoc', 'lib/**/*']
   s.require_path = 'lib'
 
-  s.has_rdoc = true
-
   s.add_dependency('activesupport', version)
   s.add_dependency('builder',       '~> 3.0.0')
   s.add_dependency('i18n',          '~> 0.5.0')
diff --git a/activerecord/activerecord.gemspec b/activerecord/activerecord.gemspec
index b1df24844a..c3cd76a714 100644
--- a/activerecord/activerecord.gemspec
+++ b/activerecord/activerecord.gemspec
@@ -17,7 +17,6 @@
   s.files        = Dir['CHANGELOG', 'README.rdoc', 'examples/**/*', 'lib/**/*']
   s.require_path = 'lib'
 
-  s.has_rdoc         = true
   s.extra_rdoc_files = %w( README.rdoc )
   s.rdoc_options.concat ['--main',  'README.rdoc']
 
diff --git a/activeresource/activeresource.gemspec b/activeresource/activeresource.gemspec
index a71168722b..c2fd707e9b 100644
--- a/activeresource/activeresource.gemspec
+++ b/activeresource/activeresource.gemspec
@@ -17,7 +17,6 @@
   s.files        = Dir['CHANGELOG', 'README.rdoc', 'examples/**/*', 'lib/**/*']
   s.require_path = 'lib'
 
-  s.has_rdoc         = true
   s.extra_rdoc_files = %w( README.rdoc )
   s.rdoc_options.concat ['--main',  'README.rdoc']
 
diff --git a/activesupport/activesupport.gemspec b/activesupport/activesupport.gemspec
index df7f68fecf..eaecb30090 100644
--- a/activesupport/activesupport.gemspec
+++ b/activesupport/activesupport.gemspec
@@ -16,6 +16,4 @@
 
   s.files        = Dir['CHANGELOG', 'README.rdoc', 'lib/**/*']
   s.require_path = 'lib'
-
-  s.has_rdoc = true
 end
diff --git a/railties/railties.gemspec b/railties/railties.gemspec
index 1e233c885e..b1eda71c7f 100644
--- a/railties/railties.gemspec
+++ b/railties/railties.gemspec
@@ -17,7 +17,6 @@
   s.require_path       = 'lib'
 
   s.rdoc_options << '--exclude' << '.'
-  s.has_rdoc = false
 
   s.add_dependency('rake',          '>= 0.8.7')
   s.add_dependency('thor',          '~> 0.14.4')