diff --git a/include/proto/proto_sockpair.h b/include/proto/proto_sockpair.h
new file mode 100644
index 0000000..4692461
--- /dev/null
+++ b/include/proto/proto_sockpair.h
@@ -0,0 +1,28 @@
+/*
+ * Socket Pair protocol layer (sockpair)
+ *
+ * Copyright HAProxy Technologies - William Lallemand <wlallemand@haproxy.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation, version 2.1
+ * exclusively.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#ifndef _PROTO_PROTO_SOCKPAIR_H
+# define _PROTO_PROTO_SOCKPAIR_H
+
+int recv_fd_uxst(int sock);
+int send_fd_uxst(int fd, int send_fd);
+
+#endif /* _PROTO_PROTO_SOCKPAIR_H  */
+