diff --git a/Editor/CollisionMeshBuilder.cs b/Editor/CollisionMeshBuilder.cs
index 6c311d9d..39208048 100644
--- a/Editor/CollisionMeshBuilder.cs
+++ b/Editor/CollisionMeshBuilder.cs
@@ -235,7 +235,7 @@ static void StripCollisionMesh(Mesh mesh)
             var positions = mesh.vertices;
             var triangles = mesh.triangles;
 
-            mesh.Clear();
+            mesh.Clear(false);
             mesh.SetVertices(positions);
             mesh.SetTriangles(triangles, 0);
             mesh.RecalculateBounds();