diff --git a/include/proto/dumpstats.h b/include/proto/dumpstats.h
index cf9ae29..844879a 100644
--- a/include/proto/dumpstats.h
+++ b/include/proto/dumpstats.h
@@ -49,6 +49,7 @@
 int stats_dump_http(struct session *s, struct buffer *rep, struct uri_auth *uri);
 int stats_dump_proxy(struct session *s, struct proxy *px, struct uri_auth *uri);
 void stats_dump_sess_to_buffer(struct session *s, struct buffer *rep);
+void stats_dump_errors_to_buffer(struct session *s, struct buffer *rep);
 
 
 #endif /* _PROTO_DUMPSTATS_H */
diff --git a/include/types/session.h b/include/types/session.h
index fb63347..356bdee 100644
--- a/include/types/session.h
+++ b/include/types/session.h
@@ -204,6 +204,14 @@
 		struct {
 			struct bref bref;
 		} sess;
+		struct {
+			int iid;		/* if >= 0, ID of the proxy to filter on */
+			struct proxy *px;	/* current proxy being dumped, NULL = not started yet. */
+			unsigned int buf;	/* buffer being dumped, 0 = req, 1 = rep */
+			unsigned int sid;	/* session ID of error being dumped */
+			int ptr;		/* <0: headers, >=0 : text pointer to restart from */
+			int bol;		/* pointer to beginning of current line */
+		} errors;
 	} data_ctx;				/* used by produce_content to dump the stats right now */
 	unsigned int uniq_id;			/* unique ID used for the traces */
 };