fix travis builds

diff --git a/include/simgrid/Exception.hpp b/include/simgrid/Exception.hpp
index 7a2ba1e..1f3d2b3 100644 (file)
--- a/include/simgrid/Exception.hpp
+++ b/include/simgrid/Exception.hpp
@@ -14,6 +14,7 @@
 #include <xbt/backtrace.hpp>
 #include <xbt/ex.h>
 
+#include <atomic>
 #include <stdexcept>
 #include <string>