diff --git a/lib/vquic/cf-ngtcp2-proxy.c b/lib/vquic/cf-ngtcp2-proxy.c
index 3a7023f300..2592b05dab 100644
--- a/lib/vquic/cf-ngtcp2-proxy.c
+++ b/lib/vquic/cf-ngtcp2-proxy.c
@@ -625,6 +625,9 @@ static nghttp3_callbacks ngh3_proxy_callbacks = {
 #ifdef NGHTTP3_CALLBACKS_V3  /* nghttp3 v1.14.0+ */
   NULL, /* recv_settings2 */
 #endif
+#ifdef NGHTTP3_CALLBACKS_V4  /* nghttp3 v1.18.0+ */
+  NULL, /* stream_close2 */
+#endif
 };
 
 static CURLcode cf_ngtcp2_proxy_h3_init(struct Curl_cfilter *cf,
diff --git a/lib/vquic/cf-ngtcp2.c b/lib/vquic/cf-ngtcp2.c
index 980516d05e..9a2b64f235 100644
--- a/lib/vquic/cf-ngtcp2.c
+++ b/lib/vquic/cf-ngtcp2.c
@@ -410,6 +410,9 @@ static nghttp3_callbacks ngh3_callbacks = {
 #ifdef NGHTTP3_CALLBACKS_V3  /* nghttp3 v1.14.0+ */
   NULL, /* recv_settings2 */
 #endif
+#ifdef NGHTTP3_CALLBACKS_V4  /* nghttp3 v1.18.0+ */
+  NULL, /* stream_close2 */
+#endif
 };
 
 static CURLcode init_ngh3_conn(struct Curl_cfilter *cf,