diff --git a/ChangeLog b/ChangeLog
index 1074feaf03..5435baac62 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Sat Feb 28 16:18:39 2009  Tanaka Akira  <akr@fsij.org>
+
+	* lib/net/http.rb: suppress warnings of non-existing instance variable
+	  access for SSL.
+
 Sat Feb 28 14:50:47 2009  Tanaka Akira  <akr@fsij.org>
 
 	* ext/socket/lib/socket.rb (BasicSocket#connect_address): returns ::1
diff --git a/lib/net/http.rb b/lib/net/http.rb
index 82e5ee6cc6..e3716b1bde 100644
--- a/lib/net/http.rb
+++ b/lib/net/http.rb
@@ -582,8 +582,11 @@ module Net   #:nodoc:
       D "opened"
       if use_ssl?
         ssl_parameters = Hash.new
+        iv_list = instance_variables
         SSL_ATTRIBUTES.each do |name|
-          if value = instance_variable_get("@#{name}")
+          ivname = "@#{name}".intern
+          if iv_list.include?(ivname) and
+             value = instance_variable_get(ivname)
             ssl_parameters[name] = value
           end
         end