diff --git a/ChangeLog b/ChangeLog
index 4ff14fb641..19f950e31a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Tue Oct  7 10:02:30 2003  Tanaka Akira  <akr@m17n.org>
+
+	* ext/socket/extconf.rb: useless assignment removed.
+
 Tue Oct  7 09:13:24 2003  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* test/ruby/test_beginendblock.rb (test_endinmethod): END{} is now
diff --git a/ext/socket/extconf.rb b/ext/socket/extconf.rb
index 5cdc949d8f..0fcb392690 100644
--- a/ext/socket/extconf.rb
+++ b/ext/socket/extconf.rb
@@ -195,8 +195,8 @@ have_header("netinet/tcp.h") if not /cygwin/ =~ RUBY_PLATFORM # for cygwin 1.1.5
 have_header("netinet/udp.h")
 
 if have_func("sendmsg") | have_func("recvmsg")
-  have_struct_member('struct msghdr', 'msg_control', header=['sys/types.h', 'sys/socket.h'])
-  have_struct_member('struct msghdr', 'msg_accrights', header=['sys/types.h', 'sys/socket.h'])
+  have_struct_member('struct msghdr', 'msg_control', ['sys/types.h', 'sys/socket.h'])
+  have_struct_member('struct msghdr', 'msg_accrights', ['sys/types.h', 'sys/socket.h'])
 end
 
 $getaddr_info_ok = false