From e20f3ec8745e81132ad71a07a221179ef8feee9d Mon Sep 17 00:00:00 2001
From: Axel Kohlmeyer <akohlmey@gmail.com>
Date: Sun, 12 Jan 2025 23:50:33 -0500
Subject: [PATCH] macOS does not like forward declarations for standard C++
 classes

---
 src/thermo.cpp | 1 -
 src/thermo.h   | 5 +----
 2 files changed, 1 insertion(+), 5 deletions(-)

diff --git a/src/thermo.cpp b/src/thermo.cpp
index d7a00fd14c..35b5016118 100644
--- a/src/thermo.cpp
+++ b/src/thermo.cpp
@@ -48,7 +48,6 @@
 
 #include <cmath>
 #include <cstring>
-#include <mutex>
 #include <stdexcept>
 
 using namespace LAMMPS_NS;
diff --git a/src/thermo.h b/src/thermo.h
index b5934f48b1..f5466e70cd 100644
--- a/src/thermo.h
+++ b/src/thermo.h
@@ -16,10 +16,7 @@
 
 #include "pointers.h"
 #include <map>
-
-namespace std {
-class mutex;
-}
+#include <mutex>
 
 namespace LAMMPS_NS {