diff --git a/ChangeLog b/ChangeLog
index bdc96a30e5..24227c5bc3 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -25,7 +25,7 @@ Sat Dec 15 13:04:26 2012  KOSAKI Motohiro  <kosaki.motohiro@gmail.com>
 
 	* io.c (internal_write_func2): new helper function for rb_write_internal2().
 	* io.c (rb_write_internal2): new function. it uses
-	  rb_thread_call_without_gvl2() instaed of rb_thread_io_blocking_region().
+	  rb_thread_call_without_gvl2() instead of rb_thread_io_blocking_region().
 	* io.c (rb_binwrite_string): uses rb_write_internal2 instead of
 	  rb_write_internal. [Bug #7134]