diff --git a/include/proto/dumpstats.h b/include/proto/dumpstats.h
index 56d8abb..7038f46 100644
--- a/include/proto/dumpstats.h
+++ b/include/proto/dumpstats.h
@@ -53,6 +53,12 @@
 #define STAT_CLI_O_ERR  7   /* dump errors */
 #define STAT_CLI_O_TAB  8   /* dump tables */
 
+/* status codes (strictly 4 chars) used in the URL to display a message */
+#define STAT_STATUS_UNKN "UNKN"	/* an unknown error occured, shouldn't happen */
+#define STAT_STATUS_DONE "DONE"	/* the action is successful */
+#define STAT_STATUS_NONE "NONE"	/* nothing happened (no action chosen or servers state didn't change) */
+#define STAT_STATUS_EXCD "EXCD"	/* an error occured becayse the buffer couldn't store all data */
+
 
 int stats_accept(struct session *s);
 int stats_sock_parse_request(struct stream_interface *si, char *line);
diff --git a/include/types/session.h b/include/types/session.h
index d1e54ac..0bbb9bf 100644
--- a/include/types/session.h
+++ b/include/types/session.h
@@ -217,6 +217,7 @@
 			short px_st, sv_st;	/* DATA_ST_INIT or DATA_ST_DATA */
 			unsigned int flags;	/* STAT_* */
 			int iid, type, sid;	/* proxy id, type and service id if bounding of stats is enabled */
+			const char *st_code;	/* pointer to the status code returned by an action */
 		} stats;
 		struct {
 			struct bref bref;	/* back-reference from the session being dumped */