diff --git a/msim/src/msim.cpp b/msim/src/msim.cpp
index c7a8dc73c..2c77d7baa 100644
--- a/msim/src/msim.cpp
+++ b/msim/src/msim.cpp
@@ -33,6 +33,7 @@
 #include <opm/input/eclipse/Schedule/Action/SimulatorUpdate.hpp>
 #include <opm/input/eclipse/Schedule/UDQ/UDQState.hpp>
 #include <opm/input/eclipse/Schedule/UDQ/UDQConfig.hpp>
+#include <opm/input/eclipse/Schedule/Well/PAvgCalculatorCollection.hpp>
 #include <opm/input/eclipse/Schedule/Well/Well.hpp>
 #include <opm/input/eclipse/Schedule/Well/WellMatcher.hpp>
 #include <opm/input/eclipse/Schedule/Well/WellTestState.hpp>
diff --git a/opm/output/eclipse/Summary.hpp b/opm/output/eclipse/Summary.hpp
index e259a376e..cf4fa7285 100644
--- a/opm/output/eclipse/Summary.hpp
+++ b/opm/output/eclipse/Summary.hpp
@@ -24,7 +24,6 @@
 #include <opm/output/data/InterRegFlowMap.hpp>
 
 #include <opm/input/eclipse/Schedule/Group/Group.hpp>
-#include <opm/input/eclipse/Schedule/Well/PAvgCalculatorCollection.hpp>
 
 #include <cstddef>
 #include <map>
@@ -37,6 +36,7 @@
 namespace Opm {
     class EclipseGrid;
     class EclipseState;
+    class PAvgCalculatorCollection;
     class Schedule;
     class SummaryConfig;
     class SummaryState;
diff --git a/src/opm/output/eclipse/Summary.cpp b/src/opm/output/eclipse/Summary.cpp
index c5f55e923..4013bf461 100644
--- a/src/opm/output/eclipse/Summary.cpp
+++ b/src/opm/output/eclipse/Summary.cpp
@@ -44,6 +44,7 @@
 #include <opm/input/eclipse/Schedule/UDQ/UDQConfig.hpp>
 #include <opm/input/eclipse/Schedule/UDQ/UDQContext.hpp>
 #include <opm/input/eclipse/Schedule/VFPProdTable.hpp>
+#include <opm/input/eclipse/Schedule/Well/PAvgCalculatorCollection.hpp>
 #include <opm/input/eclipse/Schedule/Well/Well.hpp>
 #include <opm/input/eclipse/Schedule/Well/WellConnections.hpp>
 #include <opm/input/eclipse/EclipseState/SummaryConfig/SummaryConfig.hpp>
diff --git a/tests/test_Summary.cpp b/tests/test_Summary.cpp
index 95e2d6591..5873434d9 100644
--- a/tests/test_Summary.cpp
+++ b/tests/test_Summary.cpp
@@ -48,6 +48,7 @@
 #include <opm/input/eclipse/EclipseState/Grid/EclipseGrid.hpp>
 #include <opm/input/eclipse/EclipseState/EclipseState.hpp>
 #include <opm/input/eclipse/Schedule/Schedule.hpp>
+#include <opm/input/eclipse/Schedule/Well/PAvgCalculatorCollection.hpp>
 #include <opm/input/eclipse/Schedule/Well/Well.hpp>
 #include <opm/input/eclipse/EclipseState/SummaryConfig/SummaryConfig.hpp>
 #include <opm/input/eclipse/Parser/Parser.hpp>
diff --git a/tests/test_Summary_Group.cpp b/tests/test_Summary_Group.cpp
index 1691011ab..6f4889007 100644
--- a/tests/test_Summary_Group.cpp
+++ b/tests/test_Summary_Group.cpp
@@ -46,6 +46,7 @@
 #include <opm/input/eclipse/EclipseState/Grid/EclipseGrid.hpp>
 #include <opm/input/eclipse/EclipseState/EclipseState.hpp>
 #include <opm/input/eclipse/Schedule/Schedule.hpp>
+#include <opm/input/eclipse/Schedule/Well/PAvgCalculatorCollection.hpp>
 #include <opm/input/eclipse/Schedule/Well/Well.hpp>
 #include <opm/input/eclipse/EclipseState/SummaryConfig/SummaryConfig.hpp>
 #include <opm/input/eclipse/Parser/Parser.hpp>