diff --git a/nhf/touhou/houjuu_nue/__init__.py b/nhf/touhou/houjuu_nue/__init__.py
index f14ac2e..18a0758 100644
--- a/nhf/touhou/houjuu_nue/__init__.py
+++ b/nhf/touhou/houjuu_nue/__init__.py
@@ -148,6 +148,7 @@ class Parameters(Model):
             "wing-depth": bbox.ylen,
             "wing-height": bbox.zlen,
             "wing-mass": a.total_mass(),
+            "wing-centre-of-mass": a.centre_of_mass().toTuple(),
             "items": Item.count(a),
         }