diff --git a/ChangeLog b/ChangeLog
index 3456ea1c30..998486b90f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Fri Jan  2 00:49:44 2009  Tanaka Akira  <akr@fsij.org>
+
+	* ext/socket/socket.c (sock_s_getaddrinfo): use socktype_arg.
+
 Fri Jan  2 00:12:27 2009  Tanaka Akira  <akr@fsij.org>
 
 	* ext/socket/socket.c (family_arg): extracted from
diff --git a/ext/socket/socket.c b/ext/socket/socket.c
index 6d8ad7404e..94244fc5ad 100644
--- a/ext/socket/socket.c
+++ b/ext/socket/socket.c
@@ -3270,7 +3270,7 @@ sock_s_getaddrinfo(int argc, VALUE *argv)
     hints.ai_family = NIL_P(family) ? PF_UNSPEC : family_arg(family);
 
     if (!NIL_P(socktype)) {
-	hints.ai_socktype = NUM2INT(socktype);
+	hints.ai_socktype = socktype_arg(socktype);
     }
     if (!NIL_P(protocol)) {
 	hints.ai_protocol = NUM2INT(protocol);