--- LuxCore-luxcorerender_v2.5beta1/src/slg/scene/parsematerials.cpp
+++ LuxCore-luxcorerender_v2.5beta1/src/slg/scene/parsematerials.cpp
@@ -24,6 +24,8 @@
 #include <boost/unordered_map.hpp>
 #include <boost/unordered_set.hpp>
 
+#include <atomic>
+
 #include "slg/scene/scene.h"
 #include "slg/textures/constfloat.h"
 #include "slg/textures/constfloat3.h"
--- LuxCore-luxcorerender_v2.5beta1/src/slg/scene/parseobjects.cpp
+++ LuxCore-luxcorerender_v2.5beta1/src/slg/scene/parseobjects.cpp
@@ -16,6 +16,8 @@
  * limitations under the License.                                          *
  ***************************************************************************/
 
+#include <atomic>
+
 #include "slg/scene/scene.h"
 #include "slg/utils/filenameresolver.h"
 
--- LuxCore-luxcorerender_v2.5beta1/src/slg/scene/parsevolumes.cpp
+++ LuxCore-luxcorerender_v2.5beta1/src/slg/scene/parsevolumes.cpp
@@ -24,6 +24,8 @@
 #include <boost/unordered_map.hpp>
 #include <boost/unordered_set.hpp>
 
+#include <atomic>
+
 #include "slg/scene/scene.h"
 #include "slg/textures/constfloat.h"
 #include "slg/textures/constfloat3.h"