diff --git a/ChangeLog b/ChangeLog
index c21d26c22a..88bc31946b 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Wed Apr 11 03:02:24 2012  Ayumu AIZAWA  <ayumu.aizawa@gmail.com>
+
+	* ext/ripper/lib/ripper/sexp.rb: fix spelling. patched by
+	  Jonathan Hinkle via https://github.com/ruby/ruby/pull/116
+
 Tue Apr 10 19:07:04 2012  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* error.c (rb_enc_raise): new function to raise an exception with
diff --git a/ext/ripper/lib/ripper/sexp.rb b/ext/ripper/lib/ripper/sexp.rb
index 37040e4c11..08bd152f18 100644
--- a/ext/ripper/lib/ripper/sexp.rb
+++ b/ext/ripper/lib/ripper/sexp.rb
@@ -15,7 +15,7 @@ class Ripper
   # [EXPERIMENTAL]
   # Parses +src+ and create S-exp tree.
   # Returns more readable tree rather than Ripper.sexp_raw.
-  # This method is for mainly developper use.
+  # This method is for mainly developer use.
   #
   #   require 'ripper'
   #   require 'pp'
@@ -33,7 +33,7 @@ class Ripper
 
   # [EXPERIMENTAL]
   # Parses +src+ and create S-exp tree.
-  # This method is for mainly developper use.
+  # This method is for mainly developer use.
   #
   #   require 'ripper'
   #   require 'pp'