diff --git a/include/haproxy/mux_quic.h b/include/haproxy/mux_quic.h
index 14de1e061..908a02fba 100644
--- a/include/haproxy/mux_quic.h
+++ b/include/haproxy/mux_quic.h
@@ -120,7 +120,7 @@ static inline struct stconn *qc_attach_sc(struct qcs *qcs, struct buffer *buf)
 	 * it to sedesc. See <qcs_wait_http_req> for more info.
 	 */
 	BUG_ON_HOT(!LIST_INLIST(&qcs->el_opening));
-	LIST_DELETE(&qcs->el_opening);
+	LIST_DEL_INIT(&qcs->el_opening);
 
 	return qcs->sd->sc;
 }
diff --git a/src/mux_quic.c b/src/mux_quic.c
index 0c716bb26..8e48493d0 100644
--- a/src/mux_quic.c
+++ b/src/mux_quic.c
@@ -59,8 +59,8 @@ static void qcs_free(struct qcs *qcs)
 
 	TRACE_ENTER(QMUX_EV_QCS_END, qcc->conn, qcs);
 
-	if (LIST_INLIST(&qcs->el_opening))
-		LIST_DELETE(&qcs->el_opening);
+	/* Safe to use even if already removed from the list. */
+	LIST_DEL_INIT(&qcs->el_opening);
 
 	/* Release stream endpoint descriptor. */
 	BUG_ON(qcs->sd && !se_fl_test(qcs->sd, SE_FL_ORPHAN));