diff --git a/ApplicationLibCode/ProjectDataModel/Faults/RimFaultReactivationModel.cpp b/ApplicationLibCode/ProjectDataModel/Faults/RimFaultReactivationModel.cpp
index a451d88e62..69c781ab37 100644
--- a/ApplicationLibCode/ProjectDataModel/Faults/RimFaultReactivationModel.cpp
+++ b/ApplicationLibCode/ProjectDataModel/Faults/RimFaultReactivationModel.cpp
@@ -743,7 +743,7 @@ bool RimFaultReactivationModel::extractAndExportModelData()
 //--------------------------------------------------------------------------------------------------
 ///
 //--------------------------------------------------------------------------------------------------
-std::array<double, 3> RimFaultReactivationModel::materialParameters( ElementSets elementSet )
+std::array<double, 3> RimFaultReactivationModel::materialParameters( ElementSets elementSet ) const
 {
     std::array<double, 3>                     retVal   = { 0.0, 0.0, 0.0 };
     static std::map<ElementSets, std::string> groupMap = { { ElementSets::OverBurden, "material_overburden" },
diff --git a/ApplicationLibCode/ProjectDataModel/Faults/RimFaultReactivationModel.h b/ApplicationLibCode/ProjectDataModel/Faults/RimFaultReactivationModel.h
index 7c54e70fc9..ad1bfc84b7 100644
--- a/ApplicationLibCode/ProjectDataModel/Faults/RimFaultReactivationModel.h
+++ b/ApplicationLibCode/ProjectDataModel/Faults/RimFaultReactivationModel.h
@@ -109,7 +109,7 @@ public:
 
     std::vector<QDateTime> selectedTimeSteps() const;
 
-    std::array<double, 3> materialParameters( ElementSets elementSet );
+    std::array<double, 3> materialParameters( ElementSets elementSet ) const;
 
     QStringList commandParameters() const;