diff --git a/include/common/compat.h b/include/common/compat.h
index 774f9b4..3c51fb2 100644
--- a/include/common/compat.h
+++ b/include/common/compat.h
@@ -2,7 +2,7 @@
   include/common/compat.h
   Operating system compatibility interface.
 
-  Copyright (C) 2000-2006 Willy Tarreau - w@1wt.eu
+  Copyright (C) 2000-2008 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
@@ -66,6 +66,13 @@
 #include <linux/netfilter_ipv4.h>
 #endif
 
+/* On Linux, IP_TRANSPARENT generally requires a kernel patch */
+#if defined(CONFIG_HAP_LINUX_TPROXY)
+#if !defined(IP_TRANSPARENT)
+#define IP_TRANSPARENT 19
+#endif /* !IP_TRANSPARENT */
+#endif /* CONFIG_HAP_LINUX_TPROXY */
+
 /* We'll try to enable SO_REUSEPORT on Linux 2.4 and 2.6 if not defined.
  * There are two families of values depending on the architecture. Those
  * are at least valid on Linux 2.4 and 2.6, reason why we'll rely on the
diff --git a/include/types/protocols.h b/include/types/protocols.h
index f360746..971a2a6 100644
--- a/include/types/protocols.h
+++ b/include/types/protocols.h
@@ -2,7 +2,7 @@
   include/types/protocols.h
   This file defines the structures used by generic network protocols.
 
-  Copyright (C) 2000-2007 Willy Tarreau - w@1wt.eu
+  Copyright (C) 2000-2008 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
@@ -65,6 +65,7 @@
 /* listener socket options */
 #define LI_O_NONE	0x0000
 #define LI_O_NOLINGER	0x0001	/* disable linger on this socket */
+#define LI_O_FOREIGN	0x0002	/* permit listening on foreing addresses */
 
 /* The listener will be directly referenced by the fdtab[] which holds its
  * socket. The listener provides the protocol-specific accept() function to