diff --git a/ChangeLog b/ChangeLog
index 276c60c..1c4d2b0 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+Mon Jan 14 02:40:32 2008  Minero Aoki  <aamine@loveruby.net>
+
+	* net/loveruby/cflat/ast/DefinedFunction.java: remove unused
+	  method #isFunction.
+
+	* net/loveruby/cflat/ast/UndefinedFunction.java: ditto.
+
 Mon Jan 14 02:21:22 2008  Minero Aoki  <aamine@loveruby.net>
 
 	* net/loveruby/cflat/parser/Parser.jj: unify IntegerLiteralNode
diff --git a/net/loveruby/cflat/ast/DefinedFunction.java b/net/loveruby/cflat/ast/DefinedFunction.java
index e07ab4c..98f0b53 100644
--- a/net/loveruby/cflat/ast/DefinedFunction.java
+++ b/net/loveruby/cflat/ast/DefinedFunction.java
@@ -47,10 +47,6 @@ public class DefinedFunction extends Function {
         return true;
     }
 
-    public boolean isFunction() {
-        return true;
-    }
-
     public void defineIn(ToplevelScope toplevel) {
         toplevel.defineFunction(this);
     }
diff --git a/net/loveruby/cflat/ast/UndefinedFunction.java b/net/loveruby/cflat/ast/UndefinedFunction.java
index 88c327b..23b7a28 100644
--- a/net/loveruby/cflat/ast/UndefinedFunction.java
+++ b/net/loveruby/cflat/ast/UndefinedFunction.java
@@ -19,10 +19,6 @@ public class UndefinedFunction extends Function {
         return false;
     }
 
-    public boolean isFunction() {
-        return true;
-    }
-
     public void defineIn(ToplevelScope scope) {
         throw new Error("UndefinedFunction#defineIn");
     }