diff --git a/src/quic_cc_cubic.c b/src/quic_cc_cubic.c
index 898476a2d..bc9410af9 100644
--- a/src/quic_cc_cubic.c
+++ b/src/quic_cc_cubic.c
@@ -667,9 +667,9 @@ static void quic_cc_cubic_state_cli(struct buffer *buf, const struct quic_cc_pat
 {
 	struct cubic *c = quic_cc_priv(&path->cc);
 
-	chunk_appendf(buf, "  cc: state=%s ssthresh=%u K=%u last_w_max=%u wdiff=%ld\n",
+	chunk_appendf(buf, "  cc: state=%s ssthresh=%u K=%u last_w_max=%u wdiff=%lld\n",
 	              quic_cc_state_str(c->state), c->ssthresh, c->K, c->last_w_max,
-	              (int64_t)(path->cwnd - c->last_w_max));
+	              (long long)(path->cwnd - c->last_w_max));
 }
 
 struct quic_cc_algo quic_cc_algo_cubic = {
diff --git a/src/quic_cli.c b/src/quic_cli.c
index 3a1923e6c..6d34a8312 100644
--- a/src/quic_cli.c
+++ b/src/quic_cli.c
@@ -282,23 +282,23 @@ static void dump_quic_full(struct show_quic_ctx *ctx, struct quic_conn *qc)
 	if (ctx->fields & QUIC_DUMP_FLD_PKTNS) {
 		pktns = qc->ipktns;
 		if (pktns) {
-			chunk_appendf(&trash, "  [initl] rx.ackrng=%-6zu tx.inflight=%-6zu(%ld%%)\n",
+			chunk_appendf(&trash, "  [initl] rx.ackrng=%-6zu tx.inflight=%-6zu(%llu%%)\n",
 			              pktns->rx.arngs.sz, pktns->tx.in_flight,
-			              pktns->tx.in_flight * 100 / qc->path->cwnd);
+			              (ull)pktns->tx.in_flight * 100 / qc->path->cwnd);
 		}
 
 		pktns = qc->hpktns;
 		if (pktns) {
-			chunk_appendf(&trash, "  [hndshk] rx.ackrng=%-6zu tx.inflight=%-6zu(%ld%%)\n",
+			chunk_appendf(&trash, "  [hndshk] rx.ackrng=%-6zu tx.inflight=%-6zu(%llu%%)\n",
 			              pktns->rx.arngs.sz, pktns->tx.in_flight,
-			              pktns->tx.in_flight * 100 / qc->path->cwnd);
+			              (ull)pktns->tx.in_flight * 100 / qc->path->cwnd);
 		}
 
 		pktns = qc->apktns;
 		if (pktns) {
-			chunk_appendf(&trash, "  [01rtt] rx.ackrng=%-6zu tx.inflight=%-6zu(%ld%%)\n",
+			chunk_appendf(&trash, "  [01rtt] rx.ackrng=%-6zu tx.inflight=%-6zu(%llu%%)\n",
 			              pktns->rx.arngs.sz, pktns->tx.in_flight,
-			              pktns->tx.in_flight * 100 / qc->path->cwnd);
+			              (ull)pktns->tx.in_flight * 100 / qc->path->cwnd);
 		}
 	}