diff --git a/tests/test_ParallelSerialization.cpp b/tests/test_ParallelSerialization.cpp
index e59874446..47080ee7a 100644
--- a/tests/test_ParallelSerialization.cpp
+++ b/tests/test_ParallelSerialization.cpp
@@ -52,6 +52,7 @@
 #include <opm/input/eclipse/EclipseState/IOConfig/IOConfig.hpp>
 #include <opm/input/eclipse/Schedule/RPTConfig.hpp>
 #include <opm/input/eclipse/Schedule/RSTConfig.hpp>
+#include <opm/input/eclipse/Schedule/SummaryState.hpp>
 #include <opm/input/eclipse/Schedule/Action/ActionResult.hpp>
 #include <opm/input/eclipse/Schedule/Action/State.hpp>
 #include <opm/input/eclipse/Schedule/Action/ActionAST.hpp>