diff --git a/include/haproxy/qmux_trace.h b/include/haproxy/qmux_trace.h
index 0bc89a3..ff850f0 100644
--- a/include/haproxy/qmux_trace.h
+++ b/include/haproxy/qmux_trace.h
@@ -48,6 +48,8 @@
 	{ .mask = QMUX_EV_QCS_BUILD_STRM, .name = "qcs_build_stream_frm", .desc = "qcs_build_stream_frm" },
 #define           QMUX_EV_PROTO_ERR     (1ULL << 17)
 	{ .mask = QMUX_EV_PROTO_ERR,    .name = "proto_err",    .desc = "protocol error" },
+#define           QMUX_EV_QCC_ERR       (1ULL << 18)
+	{ .mask = QMUX_EV_QCC_ERR,      .name = "qcc_err",      .desc = "connection on error" },
 	{ }
 };
 
diff --git a/src/mux_quic.c b/src/mux_quic.c
index bd67417..7adb121 100644
--- a/src/mux_quic.c
+++ b/src/mux_quic.c
@@ -34,7 +34,7 @@
 	/* This function must not be called multiple times. */
 	BUG_ON(qcc->flags & QC_CF_CC_EMIT);
 
-	TRACE_STATE("set CONNECTION_CLOSE on quic-conn", QMUX_EV_QCC_WAKE, qcc->conn);
+	TRACE_STATE("set CONNECTION_CLOSE on quic-conn", QMUX_EV_QCC_ERR, qcc->conn);
 	quic_set_connection_close(qcc->conn->handle.qc, quic_err_transport(err));
 	qcc->flags |= QC_CF_CC_EMIT;
 	tasklet_wakeup(qcc->wait_event.tasklet);
@@ -2448,7 +2448,7 @@
 	HA_ATOMIC_STORE(&conn->handle.qc->qcc, qcc);
 
 	if (qcc_install_app_ops(qcc, conn->handle.qc->app_ops)) {
-		TRACE_PROTO("Cannot install app layer", QMUX_EV_QCC_NEW, qcc->conn);
+		TRACE_PROTO("Cannot install app layer", QMUX_EV_QCC_NEW|QMUX_EV_QCC_ERR, qcc->conn);
 		/* prepare a CONNECTION_CLOSE frame */
 		quic_set_connection_close(conn->handle.qc, quic_err_transport(QC_ERR_APPLICATION_ERROR));
 		goto fail_install_app_ops;