diff --git a/libsrc/meshing/topology.cpp b/libsrc/meshing/topology.cpp
index 3e4ad494..690a5148 100644
--- a/libsrc/meshing/topology.cpp
+++ b/libsrc/meshing/topology.cpp
@@ -1,5 +1,6 @@
 #include <mystdlib.h>
 #include "meshing.hpp"
+#include <atomic>
 
 namespace netgen
 {