diff --git a/opm/simulators/utils/ParallelSerialization.cpp b/opm/simulators/utils/ParallelSerialization.cpp
index 982cbe3e1..949851442 100644
--- a/opm/simulators/utils/ParallelSerialization.cpp
+++ b/opm/simulators/utils/ParallelSerialization.cpp
@@ -35,6 +35,7 @@
 #include <opm/input/eclipse/Schedule/Group/GuideRateConfig.hpp>
 #include <opm/input/eclipse/Schedule/MSW/SICD.hpp>
 #include <opm/input/eclipse/Schedule/MSW/Valve.hpp>
+#include <opm/input/eclipse/Schedule/Network/ExtNetwork.hpp>
 #include <opm/input/eclipse/Schedule/UDQ/UDQState.hpp>
 #include <opm/input/eclipse/Schedule/UDQ/UDQASTNode.hpp>
 #include <opm/input/eclipse/Schedule/UDQ/UDQConfig.hpp>
diff --git a/opm/simulators/wells/BlackoilWellModelGeneric.cpp b/opm/simulators/wells/BlackoilWellModelGeneric.cpp
index c96c67aff..2fd52bab1 100644
--- a/opm/simulators/wells/BlackoilWellModelGeneric.cpp
+++ b/opm/simulators/wells/BlackoilWellModelGeneric.cpp
@@ -34,6 +34,7 @@
 #include <opm/input/eclipse/Schedule/Group/GConSump.hpp>
 #include <opm/input/eclipse/Schedule/Group/GuideRateConfig.hpp>
 #include <opm/input/eclipse/Schedule/Group/GuideRate.hpp>
+#include <opm/input/eclipse/Schedule/Network/ExtNetwork.hpp>
 #include <opm/input/eclipse/Schedule/Schedule.hpp>
 #include <opm/input/eclipse/EclipseState/SummaryConfig/SummaryConfig.hpp>
 
diff --git a/opm/simulators/wells/WellGroupHelpers.cpp b/opm/simulators/wells/WellGroupHelpers.cpp
index 8ab1aa355..c14144922 100644
--- a/opm/simulators/wells/WellGroupHelpers.cpp
+++ b/opm/simulators/wells/WellGroupHelpers.cpp
@@ -26,6 +26,7 @@
 #include <opm/input/eclipse/Schedule/Group/GConSale.hpp>
 #include <opm/input/eclipse/Schedule/Group/GPMaint.hpp>
 #include <opm/input/eclipse/Schedule/Group/Group.hpp>
+#include <opm/input/eclipse/Schedule/Network/ExtNetwork.hpp>
 
 #include <opm/material/fluidsystems/BlackOilFluidSystem.hpp>
 
diff --git a/tests/test_ParallelSerialization.cpp b/tests/test_ParallelSerialization.cpp
index 8a70b8a07..6eea1b753 100644
--- a/tests/test_ParallelSerialization.cpp
+++ b/tests/test_ParallelSerialization.cpp
@@ -72,6 +72,7 @@
 #include <opm/input/eclipse/Schedule/MSW/AICD.hpp>
 #include <opm/input/eclipse/Schedule/MSW/SICD.hpp>
 #include <opm/input/eclipse/Schedule/MSW/Valve.hpp>
+#include <opm/input/eclipse/Schedule/Network/ExtNetwork.hpp>
 #include <opm/input/eclipse/Schedule/Network/Node.hpp>
 #include <opm/input/eclipse/Schedule/OilVaporizationProperties.hpp>
 #include <opm/input/eclipse/Schedule/RFTConfig.hpp>