diff --git a/include/haproxy/session.h b/include/haproxy/session.h
index fa21dda6c..205bd82ac 100644
--- a/include/haproxy/session.h
+++ b/include/haproxy/session.h
@@ -73,6 +73,30 @@ static inline void session_store_counters(struct session *sess)
 	}
 }
 
+/* Increase the number of cumulated HTTP requests in the tracked counters */
+static inline void session_inc_http_req_ctr(struct session *sess)
+{
+	int i;
+
+	for (i = 0; i < MAX_SESS_STKCTR; i++)
+		stkctr_inc_http_req_ctr(&sess->stkctr[i]);
+}
+
+/* Increase the number of cumulated failed HTTP requests in the tracked
+ * counters. Only 4xx requests should be counted here so that we can
+ * distinguish between errors caused by client behaviour and other ones.
+ * Note that even 404 are interesting because they're generally caused by
+ * vulnerability scans.
+ */
+static inline void session_inc_http_err_ctr(struct session *sess)
+{
+	int i;
+
+	for (i = 0; i < MAX_SESS_STKCTR; i++)
+		stkctr_inc_http_err_ctr(&sess->stkctr[i]);
+}
+
+
 /* Remove the connection from the session list, and destroy the srv_list if it's now empty */
 static inline void session_unown_conn(struct session *sess, struct connection *conn)
 {