diff --git a/ChangeLog b/ChangeLog
index 8ed19eec40..0fdac16625 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,6 +1,11 @@
+Thu May 12 08:10:46 2011  Eric Hodel  <drbrain@segment7.net>
+
+	* lib/set.rb (class Set):  Add nodoc to internal-use methods.  Patch
+	  by Pete Higgins.  [Ruby 1.9 - Bug #4665]
+
 Thu May 12 08:01:14 2011  Martin Bosslet  <Martin.Bosslet@googlemail.com>
 
-	* ext/openssl/ossl_pkey_ec.c: Allow encryption when PEM-encoding 
+	* ext/openssl/ossl_pkey_ec.c: Allow encryption when PEM-encoding
 	  Elliptic Curve private keys.
 	  [ruby-core:35329] [Bug #4423]
 
diff --git a/lib/set.rb b/lib/set.rb
index 5655c263ba..99197961b5 100755
--- a/lib/set.rb
+++ b/lib/set.rb
@@ -76,7 +76,7 @@ class Set
     end
   end
 
-  def do_with_enum(enum, &block)
+  def do_with_enum(enum, &block) # :nodoc:
     if enum.respond_to?(:each_entry)
       enum.each_entry(&block)
     elsif enum.respond_to?(:each)
@@ -145,7 +145,7 @@ class Set
     @hash.keys
   end
 
-  def flatten_merge(set, seen = Set.new)
+  def flatten_merge(set, seen = Set.new) # :nodoc:
     set.each { |e|
       if e.is_a?(Set)
 	if seen.include?(e_id = e.object_id)