diff --git a/ChangeLog b/ChangeLog
index f72429bf12..28f2e0a349 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,7 +1,7 @@
 Sun Mar  3 01:17:20 2013  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* lib/rubygems/ext/ext_conf_builder.rb
-	  (Gem::Ext::ExtConfBuilder.hack_for_obsolete_sytle_gems): remove
+	  (Gem::Ext::ExtConfBuilder.hack_for_obsolete_style_gems): remove
 	  circular dependencies for old style gems which locate extconf.rb on
 	  the toplevel.  [ruby-core:53059] [ruby-trunk - Bug #7698]
 
diff --git a/lib/rubygems/ext/ext_conf_builder.rb b/lib/rubygems/ext/ext_conf_builder.rb
index f3fc5d8e30..67f1e08a8c 100644
--- a/lib/rubygems/ext/ext_conf_builder.rb
+++ b/lib/rubygems/ext/ext_conf_builder.rb
@@ -11,7 +11,7 @@ require 'tempfile'
 
 class Gem::Ext::ExtConfBuilder < Gem::Ext::Builder
 
-  def self.hack_for_obsolete_sytle_gems(directory)
+  def self.hack_for_obsolete_style_gems(directory)
     return unless directory and File.identical?(directory, ".")
     mf = Gem.read_binary 'Makefile'
     changed = false
@@ -40,7 +40,7 @@ class Gem::Ext::ExtConfBuilder < Gem::Ext::Builder
 
     run cmd, results
 
-    hack_for_obsolete_sytle_gems directory
+    hack_for_obsolete_style_gems directory
 
     make dest_path, results