diff --git a/src/mux_quic.c b/src/mux_quic.c
index 4c2e5a170..cb3e362ff 100644
--- a/src/mux_quic.c
+++ b/src/mux_quic.c
@@ -704,14 +704,19 @@ int qcc_recv(struct qcc *qcc, uint64_t id, uint64_t len, uint64_t offset,
  */
 int qcc_recv_max_data(struct qcc *qcc, uint64_t max)
 {
+	TRACE_ENTER(QMUX_EV_QCC_RECV, qcc->conn);
+
 	if (qcc->rfctl.md < max) {
 		qcc->rfctl.md = max;
+		TRACE_DEVEL("increase remote max-data", QMUX_EV_QCC_RECV, qcc->conn);
 
 		if (qcc->flags & QC_CF_BLK_MFCTL) {
 			qcc->flags &= ~QC_CF_BLK_MFCTL;
 			tasklet_wakeup(qcc->wait_event.tasklet);
 		}
 	}
+
+	TRACE_LEAVE(QMUX_EV_QCC_RECV, qcc->conn);
 	return 0;
 }
 
@@ -725,11 +730,14 @@ int qcc_recv_max_stream_data(struct qcc *qcc, uint64_t id, uint64_t max)
 	struct qcs *qcs;
 	struct eb64_node *node;
 
+	TRACE_ENTER(QMUX_EV_QCC_RECV, qcc->conn);
+
 	node = eb64_lookup(&qcc->streams_by_id, id);
 	if (node) {
 		qcs = eb64_entry(node, struct qcs, by_id);
 		if (max > qcs->tx.msd) {
 			qcs->tx.msd = max;
+			TRACE_DEVEL("increase remote max-stream-data", QMUX_EV_QCC_RECV|QMUX_EV_QCS_RECV, qcc->conn, qcs);
 
 			if (qcs->flags & QC_SF_BLK_SFCTL) {
 				qcs->flags &= ~QC_SF_BLK_SFCTL;
@@ -738,6 +746,7 @@ int qcc_recv_max_stream_data(struct qcc *qcc, uint64_t id, uint64_t max)
 		}
 	}
 
+	TRACE_LEAVE(QMUX_EV_QCC_RECV, qcc->conn);
 	return 0;
 }