diff --git a/src/event/quic/ngx_event_quic_migration.c b/src/event/quic/ngx_event_quic_migration.c
index 42354ca66..f1e0f3610 100644
--- a/src/event/quic/ngx_event_quic_migration.c
+++ b/src/event/quic/ngx_event_quic_migration.c
@@ -581,6 +581,17 @@ ngx_quic_send_path_challenge(ngx_connection_t *c, ngx_quic_path_t *path)
 
         frame->level = NGX_QUIC_ENCRYPTION_APPLICATION;
         frame->type = NGX_QUIC_FT_PATH_CHALLENGE;
+        frame->ignore_congestion = 1;
+
+        /*
+         * RFC 9000, 9.4. Loss Detection and Congestion Control
+         *
+         * A sender can make exceptions for probe packets so that their loss
+         * detection is independent and does not unduly cause the congestion
+         * controller to reduce its sending rate.
+         */
+
+        frame->ignore_loss = 1;
 
         ngx_memcpy(frame->u.path_challenge.data, path->challenge[n], 8);