diff --git a/opm/parser/eclipse/EclipseState/EclipseState.hpp b/opm/parser/eclipse/EclipseState/EclipseState.hpp
index c9ad93032..8d88b818a 100644
--- a/opm/parser/eclipse/EclipseState/EclipseState.hpp
+++ b/opm/parser/eclipse/EclipseState/EclipseState.hpp
@@ -124,7 +124,7 @@ namespace Opm {
             serializer(m_deckUnitSystem);
             m_inputNnc.serializeOp(serializer);
             m_inputEditNnc.serializeOp(serializer);
-            serializer(m_gridDims);
+            m_gridDims.serializeOp(serializer);
             serializer(m_simulationConfig);
             serializer(m_transMult);
             serializer(m_faults);
diff --git a/opm/parser/eclipse/EclipseState/Grid/GridDims.hpp b/opm/parser/eclipse/EclipseState/Grid/GridDims.hpp
index 3f72d13dc..caab756cd 100644
--- a/opm/parser/eclipse/EclipseState/Grid/GridDims.hpp
+++ b/opm/parser/eclipse/EclipseState/Grid/GridDims.hpp
@@ -59,6 +59,14 @@ namespace Opm {
 
         bool operator==(const GridDims& data) const;
 
+        template<class Serializer>
+        void serializeOp(Serializer& serializer)
+        {
+            serializer(m_nx);
+            serializer(m_ny);
+            serializer(m_nz);
+        }
+
     protected:
         size_t m_nx;
         size_t m_ny;