diff --git a/src/event/ngx_event_quic_transport.c b/src/event/ngx_event_quic_transport.c
index 71fe830d3..ed140e4ac 100644
--- a/src/event/ngx_event_quic_transport.c
+++ b/src/event/ngx_event_quic_transport.c
@@ -1355,14 +1355,6 @@ ngx_quic_parse_transport_param(u_char *p, u_char *end, uint16_t id,
 {
     uint64_t   varint;
 
-    switch (id) {
-    case NGX_QUIC_TP_ORIGINAL_CONNECTION_ID:
-    case NGX_QUIC_TP_STATELESS_RESET_TOKEN:
-    case NGX_QUIC_TP_PREFERRED_ADDRESS:
-        /* TODO: implement */
-        return NGX_DECLINED;
-    }
-
     switch (id) {
 
     case NGX_QUIC_TP_DISABLE_ACTIVE_MIGRATION:
@@ -1464,6 +1456,16 @@ ngx_quic_parse_transport_params(u_char *p, u_char *end, ngx_quic_tp_t *tp,
             return NGX_ERROR;
         }
 
+        switch (id) {
+        case NGX_QUIC_TP_ORIGINAL_CONNECTION_ID:
+        case NGX_QUIC_TP_PREFERRED_ADDRESS:
+        case NGX_QUIC_TP_STATELESS_RESET_TOKEN:
+            ngx_log_error(NGX_LOG_INFO, log, 0,
+                          "quic client sent forbidden transport param"
+                          " id 0x%xi", id);
+            return NGX_ERROR;
+        }
+
         p = ngx_quic_parse_int(p, end, &len);
         if (p == NULL) {
             ngx_log_error(NGX_LOG_INFO, log, 0,