diff --git a/ChangeLog b/ChangeLog
index c5d777c0d8..3913d64ec4 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,6 +1,6 @@
-Sat Sep  6 21:30:48 2008  Yukihiro Matsumoto  <matz@ruby-lang.org>
+Sat Sep  6 21:35:52 2008  Yukihiro Matsumoto  <matz@ruby-lang.org>
 
-	* ext/socket/constants.h: add some IPV6 constans.  [ruby-dev:36175]
+	* ext/socket/mkconstants.rb: add some IPV6 constans.  [ruby-dev:36175]
 
 Sat Sep  6 20:10:48 2008  Tanaka Akira  <akr@fsij.org>
 
diff --git a/ext/socket/mkconstants.rb b/ext/socket/mkconstants.rb
index 5212739876..46a6655bfc 100644
--- a/ext/socket/mkconstants.rb
+++ b/ext/socket/mkconstants.rb
@@ -260,3 +260,31 @@ NI_DGRAM
 SHUT_RD		0
 SHUT_WR		1
 SHUT_RDWR	2
+
+IPV6_JOIN_GROUP
+IPV6_LEAVE_GROUP
+IPV6_MULTICAST_HOPS
+IPV6_MULTICAST_IF
+IPV6_MULTICAST_LOOP
+IPV6_UNICAST_HOPS
+IPV6_V6ONLY
+IPV6_CHECKSUM
+IPV6_DONTFRAG
+IPV6_DSTOPTS
+IPV6_HOPLIMIT
+IPV6_HOPOPTS
+IPV6_NEXTHOP
+IPV6_PATHMTU
+IPV6_PKTINFO
+IPV6_RECVDSTOPTS
+IPV6_RECVHOPLIMIT
+IPV6_RECVHOPOPTS
+IPV6_RECVPKTINFO
+IPV6_RECVRTHDR
+IPV6_RECVTCLASS
+IPV6_RTHDR
+IPV6_RTHDRDSTOPTS
+IPV6_RTHDR_TYPE_0
+IPV6_RECVPATHMTU
+IPV6_TCLASS
+IPV6_USE_MIN_MTU