diff --git a/include/haproxy/xprt_quic-t.h b/include/haproxy/xprt_quic-t.h
index 9e282f5d5..07ccf2319 100644
--- a/include/haproxy/xprt_quic-t.h
+++ b/include/haproxy/xprt_quic-t.h
@@ -50,7 +50,7 @@ typedef unsigned long long ull;
 #define QUIC_INITIAL_IPV6_MTU      1232
 /* XXX TO DO XXX */
 /* Maximum packet length during handshake */
-#define QUIC_PACKET_MAXLEN     QUIC_INITIAL_IPV4_MTU
+#define QUIC_PACKET_MAXLEN     2048
 
 /* The minimum length of Initial packets. */
 #define QUIC_INITIAL_PACKET_MINLEN 1200
diff --git a/src/xprt_quic.c b/src/xprt_quic.c
index 783d11e02..49165c38f 100644
--- a/src/xprt_quic.c
+++ b/src/xprt_quic.c
@@ -56,7 +56,7 @@
  * before updating them with customized values.
  */
 struct quic_transport_params quic_dflt_transport_params = {
-	.max_udp_payload_size = QUIC_DFLT_MAX_UDP_PAYLOAD_SIZE,
+	.max_udp_payload_size = QUIC_PACKET_MAXLEN,
 	.ack_delay_exponent   = QUIC_DFLT_ACK_DELAY_COMPONENT,
 	.max_ack_delay        = QUIC_DFLT_MAX_ACK_DELAY,
 	.active_connection_id_limit = QUIC_ACTIVE_CONNECTION_ID_LIMIT,