1 files changed, 2 insertions, 0 deletions
diff --git a/tool/rbinstall.rb b/tool/rbinstall.rb
index 92e54c6774..9d10f59a5d 100755
--- a/tool/rbinstall.rb
+++ b/tool/rbinstall.rb
@@ -555,6 +555,7 @@ module Gem
       super
       yield(self) if defined?(yield)
       self.executables ||= []
+      self.date ||= RUBY_RELEASE_DATE
     end
 
     def self.load(path)
@@ -568,6 +569,7 @@ module Gem
 Gem::Specification.new do |s|
   s.name = #{name.dump}
   s.version = #{version.dump}
+  s.date = #{date.dump}
   s.summary = #{summary.dump}
   s.description = #{description.dump}
   s.homepage = #{homepage.dump}