diff --git a/include/types/backend.h b/include/types/backend.h
new file mode 100644
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--- /dev/null
+++ b/include/types/backend.h
@@ -0,0 +1,60 @@
+/*
+  include/types/backend.h
+  This file rassembles definitions for backends
+
+  Copyright (C) 2000-2006 Willy Tarreau - w@1wt.eu
+  
+  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 _TYPES_BACKEND_H
+#define _TYPES_BACKEND_H
+
+/* bits for proxy->options */
+#define PR_O_REDISP     0x00000001      /* allow reconnection to dispatch in case of errors */
+#define PR_O_TRANSP     0x00000002      /* transparent mode : use original DEST as dispatch */
+#define PR_O_COOK_RW    0x00000004      /* rewrite all direct cookies with the right serverid */
+#define PR_O_COOK_IND   0x00000008      /* keep only indirect cookies */
+#define PR_O_COOK_INS   0x00000010      /* insert cookies when not accessing a server directly */
+#define PR_O_COOK_PFX   0x00000020      /* rewrite all cookies by prefixing the right serverid */
+#define PR_O_COOK_ANY   (PR_O_COOK_RW | PR_O_COOK_IND | PR_O_COOK_INS | PR_O_COOK_PFX)
+#define PR_O_BALANCE_RR 0x00000040      /* balance in round-robin mode */
+#define	PR_O_KEEPALIVE  0x00000080      /* follow keep-alive sessions */
+#define	PR_O_FWDFOR     0x00000100      /* insert x-forwarded-for with client address */
+#define	PR_O_BIND_SRC   0x00000200      /* bind to a specific source address when connect()ing */
+#define PR_O_NULLNOLOG  0x00000400      /* a connect without request will not be logged */
+#define PR_O_COOK_NOC   0x00000800      /* add a 'Cache-control' header with the cookie */
+#define PR_O_COOK_POST  0x00001000      /* don't insert cookies for requests other than a POST */
+#define PR_O_HTTP_CHK   0x00002000      /* use HTTP 'OPTIONS' method to check server health */
+#define PR_O_PERSIST    0x00004000      /* server persistence stays effective even when server is down */
+#define PR_O_LOGASAP    0x00008000      /* log as soon as possible, without waiting for the session to complete */
+#define PR_O_HTTP_CLOSE 0x00010000      /* force 'connection: close' in both directions */
+#define PR_O_CHK_CACHE  0x00020000      /* require examination of cacheability of the 'set-cookie' field */
+#define PR_O_TCP_CLI_KA 0x00040000      /* enable TCP keep-alive on client-side sessions */
+#define PR_O_TCP_SRV_KA 0x00080000      /* enable TCP keep-alive on server-side sessions */
+#define PR_O_USE_ALL_BK 0x00100000      /* load-balance between backup servers */
+#define PR_O_FORCE_CLO  0x00200000      /* enforce the connection close immediately after server response */
+#define PR_O_BALANCE_SH 0x00400000      /* balance on source IP hash */
+#define PR_O_BALANCE    (PR_O_BALANCE_RR | PR_O_BALANCE_SH)
+#define PR_O_ABRT_CLOSE 0x00800000      /* immediately abort request when client closes */
+
+#endif /* _TYPES_BACKEND_H */
+
+/*
+ * Local variables:
+ *  c-indent-level: 8
+ *  c-basic-offset: 8
+ * End:
+ */