diff --git a/actionmailer/actionmailer.gemspec b/actionmailer/actionmailer.gemspec
index 67ec0d109702dfbcf066a88b2c8b4832f9636552..ea6df10a6f06cc25fed84860ab1489c922cad839 100644
--- a/actionmailer/actionmailer.gemspec
+++ b/actionmailer/actionmailer.gemspec
@@ -15,7 +15,7 @@
   s.email    = 'david@loudthinking.com'
   s.homepage = 'http://www.rubyonrails.org'
 
-  s.files        = Dir['CHANGELOG.md', 'README.rdoc', 'MIT-LICENSE', 'lib/**/*']
+  s.files        = Dir['CHANGELOG.md', 'README.rdoc', 'MIT-LICENSE', 'lib/**/*'].select { |path| File.file? path }
   s.require_path = 'lib'
   s.requirements << 'none'
 
diff --git a/actionpack/actionpack.gemspec b/actionpack/actionpack.gemspec
index 89fdd528c291e318df513f111f0ce2290e54d008..883aaab6fb2066c0e1f0c4739e482f33d63c28f2 100644
--- a/actionpack/actionpack.gemspec
+++ b/actionpack/actionpack.gemspec
@@ -15,7 +15,7 @@
   s.email    = 'david@loudthinking.com'
   s.homepage = 'http://www.rubyonrails.org'
 
-  s.files        = Dir['CHANGELOG.md', 'README.rdoc', 'MIT-LICENSE', 'lib/**/*']
+  s.files        = Dir['CHANGELOG.md', 'README.rdoc', 'MIT-LICENSE', 'lib/**/*'].select { |path| File.file? path }
   s.require_path = 'lib'
   s.requirements << 'none'
 
diff --git a/activemodel/activemodel.gemspec b/activemodel/activemodel.gemspec
index 51655fe3daacab66e44574c560f95c6c8a387057..018a60ba90220a216746013a6f53a5c915b1ea43 100644
--- a/activemodel/activemodel.gemspec
+++ b/activemodel/activemodel.gemspec
@@ -15,7 +15,7 @@
   s.email    = 'david@loudthinking.com'
   s.homepage = 'http://www.rubyonrails.org'
 
-  s.files        = Dir['CHANGELOG.md', 'MIT-LICENSE', 'README.rdoc', 'lib/**/*']
+  s.files        = Dir['CHANGELOG.md', 'MIT-LICENSE', 'README.rdoc', 'lib/**/*'].select { |path| File.file? path }
   s.require_path = 'lib'
 
   s.add_dependency 'activesupport', version
diff --git a/activerecord/activerecord.gemspec b/activerecord/activerecord.gemspec
index 31ddb01123bcf45842e640b05a8355327d39be53..2df874b525e8ce025e168636384ddaea52036c6e 100644
--- a/activerecord/activerecord.gemspec
+++ b/activerecord/activerecord.gemspec
@@ -15,7 +15,7 @@
   s.email    = 'david@loudthinking.com'
   s.homepage = 'http://www.rubyonrails.org'
 
-  s.files        = Dir['CHANGELOG.md', 'MIT-LICENSE', 'README.rdoc', 'examples/**/*', 'lib/**/*']
+  s.files        = Dir['CHANGELOG.md', 'MIT-LICENSE', 'README.rdoc', 'examples/**/*', 'lib/**/*'].select { |path| File.file? path }
   s.require_path = 'lib'
 
   s.extra_rdoc_files = %w(README.rdoc)
diff --git a/activesupport/activesupport.gemspec b/activesupport/activesupport.gemspec
index a4216d2cb4a92178d96a427072b082f93223e067..2c536cbd05c33b35c125614363f71d47d9d3eb81 100644
--- a/activesupport/activesupport.gemspec
+++ b/activesupport/activesupport.gemspec
@@ -15,7 +15,7 @@
   s.email    = 'david@loudthinking.com'
   s.homepage = 'http://www.rubyonrails.org'
 
-  s.files        = Dir['CHANGELOG.md', 'MIT-LICENSE', 'README.rdoc', 'lib/**/*']
+  s.files        = Dir['CHANGELOG.md', 'MIT-LICENSE', 'README.rdoc', 'lib/**/*'].select { |path| File.file? path }
   s.require_path = 'lib'
 
   s.rdoc_options.concat ['--encoding',  'UTF-8']
diff --git a/rails.gemspec b/rails.gemspec
index ba94354bf110264d559762e28858439fd4802708..d7a1e10459f77fc67c57525875971fc26216344c 100644
--- a/rails.gemspec
+++ b/rails.gemspec
@@ -18,7 +18,7 @@
 
   s.bindir      = 'bin'
   s.executables = []
-  s.files       = Dir['guides/**/*']
+  s.files       = Dir['guides/**/*'].select { |path| File.file? path }
 
   s.add_dependency 'activesupport', version
   s.add_dependency 'actionpack',    version
diff --git a/railties/railties.gemspec b/railties/railties.gemspec
index e39430560f5542965566f6bb76f3e4f7dc0b4530..ec0f4266c031aea4631dda4c35e5ecdc29495c0a 100644
--- a/railties/railties.gemspec
+++ b/railties/railties.gemspec
@@ -15,7 +15,7 @@
   s.email    = 'david@loudthinking.com'
   s.homepage = 'http://www.rubyonrails.org'
 
-  s.files        = Dir['CHANGELOG.md', 'README.rdoc', 'bin/**/*', 'lib/**/{*,.[a-z]*}']
+  s.files        = Dir['CHANGELOG.md', 'README.rdoc', 'bin/**/*', 'lib/**/{*,.[a-z]*}'].select { |path| File.file? path }
   s.require_path = 'lib'
 
   s.bindir      = 'bin'