diff --git a/insns.def b/insns.def
index 7d75f2a0ce..60f94cfd24 100644
--- a/insns.def
+++ b/insns.def
@@ -5,7 +5,7 @@
   created at: 04/01/01 01:17:55 JST
 
   Copyright (C) 2004-2007 Koichi Sasada
-  Massive rewtite by @shyouhei in 2017.
+  Massive rewrite by @shyouhei in 2017.
  */
 
 /* Some comments about this file's contents: