diff --git a/ChangeLog b/ChangeLog
index 6788e4ae20..da790ffa8f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -3,11 +3,6 @@ Thu Mar 24 22:38:18 2016  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 	* strftime.c (FMT, FMTV): remove recursive-assignments to get rid
 	  of undefined behavior.  [ruby-core:74532] [Bug #12213]
 
-Thu Mar 24 22:38:05 2016  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* strftime.c (FMT, FMTV): remove recursive-assignments to get rid
-	  of undefined behavior.  [ruby-core:74532] [Bug #12213]
-
 Thu Mar 24 17:44:02 2016  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* strftime.c (FMT_PADDING): extract format for padding.