diff --git a/src/mux_quic.c b/src/mux_quic.c
index cb90bb38b..e1937d65c 100644
--- a/src/mux_quic.c
+++ b/src/mux_quic.c
@@ -43,7 +43,7 @@ struct qcs *qcs_new(struct qcc *qcc, uint64_t id, enum qcs_type type)
 	qcs->tx.offset = 0;
 	qcs->tx.sent_offset = 0;
 	qcs->tx.ack_offset = 0;
-	qcs->tx.acked_frms = EB_ROOT_UNIQUE;
+	qcs->tx.acked_frms = EB_ROOT;
 
 	qcs->wait_event.tasklet = NULL;
 	qcs->wait_event.events = 0;