diff --git a/opm/parser/eclipse/EclipseState/Schedule/Group.cpp b/opm/parser/eclipse/EclipseState/Schedule/Group.cpp
index edfff3c79..488e81d22 100644
--- a/opm/parser/eclipse/EclipseState/Schedule/Group.cpp
+++ b/opm/parser/eclipse/EclipseState/Schedule/Group.cpp
@@ -35,9 +35,7 @@ namespace Opm {
         waterTarget( timeMap , INVALID_GROUP_RATE ),
         gasTarget( timeMap , INVALID_GROUP_RATE ),
         liquidTarget( timeMap , INVALID_GROUP_RATE ),
-        reservoirVolumeTarget( timeMap , INVALID_GROUP_RATE ),
-        efficiencyFactor( timeMap, INVALID_EFFICIENCY_FACTOR ),
-        transferEfficiencyFactor( timeMap, false )
+        reservoirVolumeTarget( timeMap , INVALID_GROUP_RATE )
     {}
 
     GroupInjection::InjectionData::InjectionData(const TimeMap& timeMap) :
@@ -57,7 +55,9 @@ namespace Opm {
         m_production( timeMap ),
         m_wells( timeMap, std::make_shared< const WellSet >() ),
         m_isProductionGroup( timeMap, false),
-        m_isInjectionGroup( timeMap, false)
+        m_isInjectionGroup( timeMap, false),
+        m_efficiencyFactor( timeMap, 1.0),
+        m_transferEfficiencyFactor( timeMap, 1)
     {
         m_name = name_;
         m_creationTimeStep = creationTimeStep;
@@ -248,20 +248,20 @@ namespace Opm {
 
 
     void Group::setGroupEfficiencyFactor(size_t time_step, double factor) {
-        m_production.efficiencyFactor.update(time_step , factor);
+        m_efficiencyFactor.update(time_step , factor);
     }
 
     double Group::getGroupEfficiencyFactor(size_t time_step) const {
-        return m_production.efficiencyFactor.get(time_step);
+        return m_efficiencyFactor.get(time_step);
     }
 
     void  Group::setTransferGroupEfficiencyFactor(size_t time_step, bool transfer) {
-        m_production.transferEfficiencyFactor.update(time_step , transfer);
+        m_transferEfficiencyFactor.update(time_step , transfer);
     }
 
 
     bool  Group::getTransferGroupEfficiencyFactor(size_t time_step) const {
-        return m_production.transferEfficiencyFactor.get(time_step);
+        return m_transferEfficiencyFactor.get(time_step);
     }
 
     /*****************************************************************/
diff --git a/opm/parser/eclipse/EclipseState/Schedule/Group.hpp b/opm/parser/eclipse/EclipseState/Schedule/Group.hpp
index ef347d640..903e477c7 100644
--- a/opm/parser/eclipse/EclipseState/Schedule/Group.hpp
+++ b/opm/parser/eclipse/EclipseState/Schedule/Group.hpp
@@ -60,8 +60,6 @@ namespace Opm {
             DynamicState< double > gasTarget;
             DynamicState< double > liquidTarget;
             DynamicState< double > reservoirVolumeTarget;
-            DynamicState< double > efficiencyFactor;
-            DynamicState< int >    transferEfficiencyFactor;
         };
     }
 
@@ -138,6 +136,8 @@ namespace Opm {
         DynamicState<std::shared_ptr< const WellSet > > m_wells;
         DynamicState<int> m_isProductionGroup;
         DynamicState<int> m_isInjectionGroup;
+        DynamicState<double> m_efficiencyFactor;
+        DynamicState<int> m_transferEfficiencyFactor;
     };
 }