diff --git a/rake-tasks/crazy_fun/mappings/ruby.rb b/rake-tasks/crazy_fun/mappings/ruby.rb
index c96154fe06c95..6f2ef50453b40 100644
--- a/rake-tasks/crazy_fun/mappings/ruby.rb
+++ b/rake-tasks/crazy_fun/mappings/ruby.rb
@@ -234,15 +234,16 @@ def define_gem_install_task(dir, args)
 
     def gemspec(args)
       Gem::Specification.new do |s|
-        s.name        = args[:name]
-        s.version     = args[:version]
-        s.summary     = args[:summary]
-        s.description = args[:description]
-        s.authors     = args[:author]
-        s.email       = args[:email]
-        s.homepage    = args[:homepage]
-        s.files       = Dir[*args[:files]]
-        s.license     = args[:license]
+        s.name                  = args[:name]
+        s.version               = args[:version]
+        s.summary               = args[:summary]
+        s.description           = args[:description]
+        s.authors               = args[:author]
+        s.email                 = args[:email]
+        s.homepage              = args[:homepage]
+        s.files                 = Dir[*args[:files]]
+        s.license               = args[:license]
+        s.required_ruby_version = args[:required_ruby_version]
 
         args[:gemdeps].each { |dep| s.add_dependency(*dep.shift) }
         args[:devdeps].each { |dep| s.add_development_dependency(*dep.shift) }
diff --git a/rb/CHANGES b/rb/CHANGES
index ff1f1c53849f8..4c021eeef06c8 100644
--- a/rb/CHANGES
+++ b/rb/CHANGES
@@ -1,3 +1,9 @@
+2.38.0 (???)
+============
+
+* Enforce required ruby version in gemspec, not just through rubyzip.
+
+
 2.37.0 (2013-10-18)
 ===================
 
@@ -20,7 +26,7 @@ IE:
   * Use native events by default, also for remote IE (#4695)
 Safari:
   * Enable screenshots and input devices in the client.
-  
+
 2.35.1 (2013-08-26)
 ===================
 
diff --git a/rb/build.desc b/rb/build.desc
index 4edbb084f6935..13cca0cf7697e 100644
--- a/rb/build.desc
+++ b/rb/build.desc
@@ -39,7 +39,8 @@ rubygem(
     "CHANGES",
     "README.md",
     "COPYING"
-  ]
+  ],
+  required_ruby_version = ">= 1.9.2"
 )
 
 rubydocs(