diff --git a/ChangeLog b/ChangeLog
index 62ca80880d..244760cd24 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Mon Jun 25 00:45:02 2007  Koichi Sasada  <ko1@atdot.net>
+
+	* insns.def (invokesuper): fix error message.
+
 Mon Jun 25 00:14:13 2007  Koichi Sasada  <ko1@atdot.net>
 
 	* vm.c: some refactoring.
diff --git a/insns.def b/insns.def
index 8ad42c7ca9..a13dff6580 100644
--- a/insns.def
+++ b/insns.def
@@ -1258,7 +1258,7 @@ invokesuper
 
 	if (TOPN(num) == Qfalse) {
 	    /* zsuper */
-	    rb_raise(rb_eRuntimeError, "zsuper from method defined by define_method() is not supported. Specify all arguments.");
+	    rb_raise(rb_eRuntimeError, "implicit argument passing of super from method defined by define_method() is not supported. Specify all arguments explicitly.");
 	}
     }
     else {