diff --git a/lib/rubygems/requirement.rb b/lib/rubygems/requirement.rb
index 10d4befc7b..d9796c4208 100644
--- a/lib/rubygems/requirement.rb
+++ b/lib/rubygems/requirement.rb
@@ -214,10 +214,6 @@ class Gem::Requirement
     yaml_initialize coder.tag, coder.map
   end
 
-  def to_yaml_properties # :nodoc:
-    ["@requirements"]
-  end
-
   def encode_with(coder) # :nodoc:
     coder.add "requirements", @requirements
   end
diff --git a/lib/rubygems/version.rb b/lib/rubygems/version.rb
index e174d8ad95..d9cd91bffa 100644
--- a/lib/rubygems/version.rb
+++ b/lib/rubygems/version.rb
@@ -297,10 +297,6 @@ class Gem::Version
     @hash = nil
   end
 
-  def to_yaml_properties # :nodoc:
-    ["@version"]
-  end
-
   def encode_with(coder) # :nodoc:
     coder.add "version", @version
   end