diff --git a/include/vde/curves/surface_intersection.h b/include/vde/curves/surface_intersection.h
index e5a4708..9faefe9 100644
--- a/include/vde/curves/surface_intersection.h
+++ b/include/vde/curves/surface_intersection.h
@@ -4,7 +4,7 @@
 #include "vde/core/aabb.h"
 #include <vector>
 #include <functional>
-#include <optional>
+
 #include <utility>
 
 namespace vde::curves {
@@ -25,7 +25,6 @@ struct IntersectionCurve {
     /// 各采样点在曲面 B 上的参数坐标 (u2, v2)
     std::vector<std::pair<double, double>> params_b;
     /// 沿交线采样点拟合的 NURBS 曲线（可选）
-    std::optional<NurbsCurve> curve;
 };
 
 /**