diff --git a/include/proto/session.h b/include/proto/session.h
index 78a2222..fb2b6a6 100644
--- a/include/proto/session.h
+++ b/include/proto/session.h
@@ -36,6 +36,8 @@
 /* perform minimal intializations, report 0 in case of error, 1 if OK. */
 int init_session();
 
+/* kill a session and set the termination flags to <why> (one of SN_ERR_*) */
+void session_shutdown(struct session *session, int why);
 
 void session_process_counters(struct session *s);
 void sess_change_server(struct session *sess, struct server *newsrv);
diff --git a/include/types/session.h b/include/types/session.h
index 6054924..a707aa5 100644
--- a/include/types/session.h
+++ b/include/types/session.h
@@ -56,7 +56,7 @@
 #define SN_REDIRECTABLE	0x00000400	/* set if this session is redirectable (GET or HEAD) */
 #define SN_TUNNEL	0x00000800	/* tunnel-mode session, nothing to catch after data */
 
-/* session termination conditions, bits values 0x1000 to 0x7000 (0-7 shift 12) */
+/* session termination conditions, bits values 0x1000 to 0x7000 (0-9 shift 12) */
 #define SN_ERR_NONE     0x00000000
 #define SN_ERR_CLITO	0x00001000	/* client time-out */
 #define SN_ERR_CLICL	0x00002000	/* client closed (read/write error) */
@@ -66,6 +66,7 @@
 #define SN_ERR_RESOURCE	0x00006000	/* the proxy encountered a lack of a local resources (fd, mem, ...) */
 #define SN_ERR_INTERNAL	0x00007000	/* the proxy encountered an internal error */
 #define SN_ERR_DOWN	0x00008000	/* the proxy killed a session because the backend became unavailable */
+#define SN_ERR_KILLED	0x00009000	/* the proxy killed a session because it was asked to do so */
 #define SN_ERR_MASK	0x0000f000	/* mask to get only session error flags */
 #define SN_ERR_SHIFT	12		/* bit shift */