diff --git a/include/haproxy/qmux_http.h b/include/haproxy/qmux_http.h
index 4a7711401..a7dbe7cc3 100644
--- a/include/haproxy/qmux_http.h
+++ b/include/haproxy/qmux_http.h
@@ -10,6 +10,7 @@ size_t qcs_http_rcv_buf(struct qcs *qcs, struct buffer *buf, size_t count,
                         char *fin);
 size_t qcs_http_snd_buf(struct qcs *qcs, struct buffer *buf, size_t count,
                         char *fin);
+size_t qcs_http_reset_buf(struct qcs *qcs, struct buffer *buf, size_t count);
 
 #endif /* USE_QUIC */
 
diff --git a/src/mux_quic.c b/src/mux_quic.c
index a396e340d..1c615f4e1 100644
--- a/src/mux_quic.c
+++ b/src/mux_quic.c
@@ -2110,7 +2110,7 @@ static size_t qc_snd_buf(struct stconn *sc, struct buffer *buf,
 	BUG_ON_HOT(qcs->flags & QC_SF_DETACH);
 
 	if (qcs_is_close_local(qcs) || (qcs->flags & QC_SF_TO_RESET)) {
-		ret = count;
+		ret = qcs_http_reset_buf(qcs, buf, count);
 		goto end;
 	}
 
diff --git a/src/qmux_http.c b/src/qmux_http.c
index c77707460..3ce4a3438 100644
--- a/src/qmux_http.c
+++ b/src/qmux_http.c
@@ -87,3 +87,23 @@ size_t qcs_http_snd_buf(struct qcs *qcs, struct buffer *buf, size_t count,
 
 	return ret;
 }
+
+/* QUIC MUX snd_buf reset. HTX data stored in <buf> of length <count> will be
+ * cleared. This can be used when data should not be transmitted any longer.
+ *
+ * Return the size in bytes of cleared data.
+ */
+size_t qcs_http_reset_buf(struct qcs *qcs, struct buffer *buf, size_t count)
+{
+	struct htx *htx;
+
+	TRACE_ENTER(QMUX_EV_STRM_SEND, qcs->qcc->conn, qcs);
+
+	htx = htx_from_buf(buf);
+	htx_reset(htx);
+	htx_to_buf(htx, buf);
+
+	TRACE_LEAVE(QMUX_EV_STRM_SEND, qcs->qcc->conn, qcs);
+
+	return count;
+}