From d48b7df594f2ae8cd6d2745996222f8701d92f9e Mon Sep 17 00:00:00 2001
From: YoungHui Park <ypark234@wisc.edu>
Date: Tue, 30 Jun 2020 22:07:50 -0500
Subject: [PATCH] Bank surface number if surf src is triggered

---
 src/particle.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/particle.cpp b/src/particle.cpp
index 3a05d11ff5..b6e936b620 100644
--- a/src/particle.cpp
+++ b/src/particle.cpp
@@ -420,6 +420,7 @@ Particle::cross_surface()
     site.E = this->E_;
     site.wgt = this->wgt_;
     site.delayed_group = this->delayed_group_;
+    site.surf_num = surf->id_;
     site.particle = this->type_;
     // site.parent_id = this->id_;
     // site.progeny_id = this->n_progeny_;