diff --git a/ChangeLog b/ChangeLog
index 453101bb9e..04005d062a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,7 +1,7 @@
 Wed Jun 29 15:18:28 2016  NARUSE, Yui  <naruse@ruby-lang.org>
 
 	* insns.def (opt_succ): optimize like r55515. (but this argument is
-	  consntant)
+	  constant)
 
 Wed Jun 29 12:41:58 2016  Shugo Maeda  <shugo@ruby-lang.org>