diff --git a/ChangeLog b/ChangeLog
index 6c4d1490..ddddbe0b 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2009-03-08  Tatsuhiro Tsujikawa  <t-tujikawa@users.sourceforge.net>
+
+	Declared hide() in OptionHandler.
+	* src/NameMatchOptionHandler.h
+	* src/OptionHandler.h
+	* src/OptionHandlerImpl.h
+	
 2009-03-08  Tatsuhiro Tsujikawa  <t-tujikawa@users.sourceforge.net>
 
 	Updated doc
diff --git a/src/NameMatchOptionHandler.h b/src/NameMatchOptionHandler.h
index a1024951..aa957632 100644
--- a/src/NameMatchOptionHandler.h
+++ b/src/NameMatchOptionHandler.h
@@ -141,7 +141,7 @@ public:
     return _hidden;
   }
 
-  void hide()
+  virtual void hide()
   {
     _hidden = true;
   }
diff --git a/src/OptionHandler.h b/src/OptionHandler.h
index c8306488..e068373e 100644
--- a/src/OptionHandler.h
+++ b/src/OptionHandler.h
@@ -70,6 +70,8 @@ public:
 
   virtual bool isHidden() const = 0;
 
+  virtual void hide() = 0;
+
   enum ARG_TYPE {
     REQ_ARG,
     OPT_ARG,
diff --git a/src/OptionHandlerImpl.h b/src/OptionHandlerImpl.h
index 2475d4a9..3b9d4046 100644
--- a/src/OptionHandlerImpl.h
+++ b/src/OptionHandlerImpl.h
@@ -81,6 +81,8 @@ public:
 
   virtual bool isHidden() const { return true; }
 
+  virtual void hide() {}
+
   virtual OptionHandler::ARG_TYPE getArgType() const
   {
     return OptionHandler::NO_ARG;