diff --git a/ChangeLog b/ChangeLog
index 012246cb0f..c519b9374d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Mon Mar  8 21:38:18 2004  Minero Aoki  <aamine@loveruby.net>
+
+	* lib/net/http.rb (add_header): remove warning. [ruby-dev:23170]
+
 Mon Mar  8 21:09:39  Hirokazu Yamamoto  <ocean@m2.ccsnet.ne.jp>
 
 	* dir.c (range): Cancel change for incomplete '['. More discussion
diff --git a/lib/net/http.rb b/lib/net/http.rb
index 9b3ee5960b..7cd0acd659 100644
--- a/lib/net/http.rb
+++ b/lib/net/http.rb
@@ -1045,7 +1045,7 @@ module Net # :nodoc:
     #   p request.get_fields('X-My-Header')   #=> ["a", "b", "c"]
     #
     def add_header(key, val)
-      if header.key?(key.downcase)
+      if @header.key?(key.downcase)
         @header[key.downcase].concat Array(val)
       else
         @header[key.downcase] = Array(val).dup