diff --git a/.gitignore b/.gitignore
index ef78450cff..80c12594dd 100644
--- a/.gitignore
+++ b/.gitignore
@@ -16,6 +16,7 @@
 *.rej
 *.sav
 *.swp
+*.yarb
 *~
 .*-*
 .*.list
diff --git a/ChangeLog b/ChangeLog
index 4375b71eee..664197bc3e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Wed Dec  9 09:46:19 2015  SHIBATA Hiroshi  <hsbt@ruby-lang.org>
+
+	* .gitignore: ignored ISeq binary format.
+
 Wed Dec  9 09:34:41 2015  Koichi Sasada  <ko1@atdot.net>
 
 	* *.c (*_memsize): do not check ptr.