diff --git a/opm/simulators/utils/ParallelRestart.cpp b/opm/simulators/utils/ParallelRestart.cpp
index 3cce57add..0f0b4cbd6 100644
--- a/opm/simulators/utils/ParallelRestart.cpp
+++ b/opm/simulators/utils/ParallelRestart.cpp
@@ -23,6 +23,7 @@
 
 #include "ParallelRestart.hpp"
 #include <ctime>
+#include <cstring>
 #include <dune/common/parallel/mpitraits.hh>
 #include <opm/parser/eclipse/EclipseState/Schedule/SummaryState.hpp>