From f40c7aac7ed8b539db347c8766a1555c5c94a839 Mon Sep 17 00:00:00 2001
From: YoungHui Park <ypark234@wisc.edu>
Date: Thu, 19 Nov 2020 17:40:33 -0600
Subject: [PATCH] Set surf_id of IndependentSource with default value

---
 src/source.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/source.cpp b/src/source.cpp
index 0efaf52bab..2bbe7c3213 100644
--- a/src/source.cpp
+++ b/src/source.cpp
@@ -225,6 +225,8 @@ Particle::Bank IndependentSource::sample(uint64_t* seed) const
 
   // Set delayed group
   site.delayed_group = 0;
+  // Set surface ID
+  site.surf_id = 0;
 
   return site;
 }