diff --git a/ChangeLog b/ChangeLog
index 5ebe8e5657..2dd3a27542 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+Fri Apr 27 07:15:07 2012  Tanaka Akira  <akr@fsij.org>
+
+	* ext/socket/socket.c (sock_s_pack_sockaddr_un): support the longest
+	  path in sockaddr_un, really.
+	  reported by nagachika.
+	  http://d.hatena.ne.jp/nagachika/20120426/ruby_trunk_changes_35474_35476
+
 Thu Apr 26 12:28:06 2012  Tanaka Akira  <akr@fsij.org>
 
 	* ext/socket/raddrinfo.c (init_unix_addrinfo): support the longest
diff --git a/ext/socket/socket.c b/ext/socket/socket.c
index 7830a14e26..5a8bf07751 100644
--- a/ext/socket/socket.c
+++ b/ext/socket/socket.c
@@ -1426,7 +1426,7 @@ sock_s_pack_sockaddr_un(VALUE self, VALUE path)
     StringValue(path);
     MEMZERO(&sockaddr, struct sockaddr_un, 1);
     sockaddr.sun_family = AF_UNIX;
-    if (sizeof(sockaddr.sun_path) <= (size_t)RSTRING_LEN(path)) {
+    if (sizeof(sockaddr.sun_path) < (size_t)RSTRING_LEN(path)) {
         rb_raise(rb_eArgError, "too long unix socket path (%"PRIuSIZE" bytes given but %"PRIuSIZE" bytes max)",
             (size_t)RSTRING_LEN(path), sizeof(sockaddr.sun_path));
     }