diff --git a/ChangeLog b/ChangeLog
index 6a59b5069e..dd6d07d4f2 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+Sat Apr  6 01:21:56 2013  Tanaka Akira  <akr@fsij.org>
+
+	* ext/socket/init.c (cloexec_accept): Fix a compile error on
+	  Debian GNU/kFreeBSD.  Consider HAVE_ACCEPT4 is defined
+	  but SOCK_CLOEXEC is not defined.
+
 Sat Apr  6 00:19:30 2013  Hiroshi Shirosaki  <h.shirosaki@gmail.com>
 
 	* load.c (features_index_add): use rb_str_subseq() to specify C string
diff --git a/ext/socket/init.c b/ext/socket/init.c
index 44228d3463..33ddc05fa4 100644
--- a/ext/socket/init.c
+++ b/ext/socket/init.c
@@ -497,7 +497,11 @@ cloexec_accept(int socket, struct sockaddr *address, socklen_t *address_len)
     if (address_len) len0 = *address_len;
 #ifdef HAVE_ACCEPT4
     if (try_accept4) {
-        ret = accept4(socket, address, address_len, SOCK_CLOEXEC);
+        int flags = 0;
+#ifdef SOCK_CLOEXEC
+        flags |= SOCK_CLOEXEC;
+#endif
+        ret = accept4(socket, address, address_len, flags);
         /* accept4 is available since Linux 2.6.28, glibc 2.10. */
         if (ret != -1) {
             if (ret <= 2)