diff --git a/opm/input/eclipse/Schedule/Group/GroupEconProductionLimits.hpp b/opm/input/eclipse/Schedule/Group/GroupEconProductionLimits.hpp
index 9b2dc3987..62df0901a 100644
--- a/opm/input/eclipse/Schedule/Group/GroupEconProductionLimits.hpp
+++ b/opm/input/eclipse/Schedule/Group/GroupEconProductionLimits.hpp
@@ -59,7 +59,18 @@ public:
         int maxOpenWells() const;
         bool operator==(const GEconGroup& other) const;
         int reportStep() const;
-        template<class Serializer> void serializeOp(Serializer& serializer);
+        template<class Serializer>
+        void serializeOp(Serializer& serializer)
+        {
+            serializer(m_min_oil_rate);
+            serializer(m_min_gas_rate);
+            serializer(m_max_water_cut);
+            serializer(m_max_gas_oil_ratio);
+            serializer(m_max_water_gas_ratio);
+            serializer(m_workover);
+            serializer(m_end_run);
+            serializer(m_max_open_wells);
+        }
         static GEconGroup serializationTestObject();
         EconWorkover workover() const;
 
diff --git a/src/opm/input/eclipse/Schedule/Group/GroupEconProductionLimits.cpp b/src/opm/input/eclipse/Schedule/Group/GroupEconProductionLimits.cpp
index cd87794ea..c1a379203 100644
--- a/src/opm/input/eclipse/Schedule/Group/GroupEconProductionLimits.cpp
+++ b/src/opm/input/eclipse/Schedule/Group/GroupEconProductionLimits.cpp
@@ -201,19 +201,6 @@ int GroupEconProductionLimits::GEconGroup::reportStep() const {
     return m_report_step;
 }
 
-template<class Serializer>
-void GroupEconProductionLimits::GEconGroup::serializeOp(Serializer& serializer)
-{
-    serializer(m_min_oil_rate);
-    serializer(m_min_gas_rate);
-    serializer(m_max_water_cut);
-    serializer(m_max_gas_oil_ratio);
-    serializer(m_max_water_gas_ratio);
-    serializer(m_workover);
-    serializer(m_end_run);
-    serializer(m_max_open_wells);
-}
-
 GroupEconProductionLimits::GEconGroup GroupEconProductionLimits::GEconGroup::serializationTestObject()
 {
     GEconGroup group;