diff --git a/ChangeLog b/ChangeLog
index cf44890b46..bf48bea846 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+Mon Sep 22 09:28:43 2014  Eric Wong  <e@80x24.org>
+
+	* ext/socket/ancdata.c ({send,recv}msg_args_struct): 24 => 16 bytes
+	* ext/socket/init.c (connect_arg): ditto
+	* ext/socket/raddrinfo.c (getnameinfo_arg): 56 => 48 bytes
+	  (reductions only for 64-bit systems)
+
 Mon Sep 22 02:04:25 2014  Tanaka Akira  <akr@fsij.org>
 
 	* lib/drb/drb.rb: Support graceful shutdown.
diff --git a/ext/socket/ancdata.c b/ext/socket/ancdata.c
index 218085d5ce..f0dbb2bfeb 100644
--- a/ext/socket/ancdata.c
+++ b/ext/socket/ancdata.c
@@ -1105,8 +1105,8 @@ ancillary_cmsg_is_p(VALUE self, VALUE vlevel, VALUE vtype)
 #if defined(HAVE_SENDMSG)
 struct sendmsg_args_struct {
     int fd;
-    const struct msghdr *msg;
     int flags;
+    const struct msghdr *msg;
 };
 
 static void *
@@ -1358,8 +1358,8 @@ rsock_bsock_sendmsg_nonblock(int argc, VALUE *argv, VALUE sock)
 #if defined(HAVE_RECVMSG)
 struct recvmsg_args_struct {
     int fd;
-    struct msghdr *msg;
     int flags;
+    struct msghdr *msg;
 };
 
 ssize_t
diff --git a/ext/socket/init.c b/ext/socket/init.c
index 670349ae14..bcc1e52d50 100644
--- a/ext/socket/init.c
+++ b/ext/socket/init.c
@@ -400,8 +400,8 @@ wait_connectable(int fd)
 
 struct connect_arg {
     int fd;
-    const struct sockaddr *sockaddr;
     socklen_t len;
+    const struct sockaddr *sockaddr;
 };
 
 static VALUE
diff --git a/ext/socket/raddrinfo.c b/ext/socket/raddrinfo.c
index ceed9c3ac1..8e6434717a 100644
--- a/ext/socket/raddrinfo.c
+++ b/ext/socket/raddrinfo.c
@@ -312,11 +312,11 @@ struct getnameinfo_arg
 {
     const struct sockaddr *sa;
     socklen_t salen;
+    int flags;
     char *host;
     size_t hostlen;
     char *serv;
     size_t servlen;
-    int flags;
 };
 
 static void *