diff --git a/ApplicationCode/ProjectDataModel/Flow/RimWellRftPlot.cpp b/ApplicationCode/ProjectDataModel/Flow/RimWellRftPlot.cpp
index 41e856191d..e1cf5e1f96 100644
--- a/ApplicationCode/ProjectDataModel/Flow/RimWellRftPlot.cpp
+++ b/ApplicationCode/ProjectDataModel/Flow/RimWellRftPlot.cpp
@@ -562,7 +562,7 @@ std::map<QDateTime, std::set<RifWellRftAddress>> RimWellRftPlot::timeStepsFromRf
 //--------------------------------------------------------------------------------------------------
 /// 
 //--------------------------------------------------------------------------------------------------
-std::map<QDateTime, std::set<RifWellRftAddress>> RimWellRftPlot::timeStepsFromGridCase(RimEclipseCase* gridCase) const
+std::map<QDateTime, std::set<RifWellRftAddress>> RimWellRftPlot::timeStepsFromGridCase(RimEclipseCase* gridCase)
 {
     const RigEclipseCaseData* const eclipseCaseData = gridCase->eclipseCaseData();
     std::pair<size_t, QString> resultDataInfo = pressureResultDataInfo(eclipseCaseData);
@@ -585,7 +585,7 @@ std::map<QDateTime, std::set<RifWellRftAddress>> RimWellRftPlot::timeStepsFromGr
 //--------------------------------------------------------------------------------------------------
 /// 
 //--------------------------------------------------------------------------------------------------
-std::map<QDateTime, std::set<RifWellRftAddress> > RimWellRftPlot::timeStepsFromWellLogFile(RimWellLogFile* wellLogFile) const
+std::map<QDateTime, std::set<RifWellRftAddress> > RimWellRftPlot::timeStepsFromWellLogFile(RimWellLogFile* wellLogFile)
 {
     std::map<QDateTime, std::set<RifWellRftAddress> > timeStepsMap;
 
diff --git a/ApplicationCode/ProjectDataModel/Flow/RimWellRftPlot.h b/ApplicationCode/ProjectDataModel/Flow/RimWellRftPlot.h
index ce1e6ffed9..0732b58064 100644
--- a/ApplicationCode/ProjectDataModel/Flow/RimWellRftPlot.h
+++ b/ApplicationCode/ProjectDataModel/Flow/RimWellRftPlot.h
@@ -127,9 +127,9 @@ private:
     std::vector<RimEclipseResultCase*>              gridCasesFromEclipseCases(const std::vector<std::tuple<RimEclipseResultCase*, bool, bool>>& eclipseCasesTuple) const;
     std::vector<RimEclipseResultCase*>              rftCasesFromEclipseCases(const std::vector<std::tuple<RimEclipseResultCase*, bool, bool>>& eclipseCasesTuple) const;
     std::map<QDateTime, std::set<RifWellRftAddress>> timeStepsFromRftCase(RimEclipseResultCase* gridCase) const;
-    std::map<QDateTime, std::set<RifWellRftAddress>> timeStepsFromGridCase(RimEclipseCase* gridCase) const;
-    std::map<QDateTime, std::set<RifWellRftAddress>> timeStepsFromWellLogFile(RimWellLogFile* wellLogFile) const;
-    std::map<QDateTime, std::set<RifWellRftAddress>> adjacentTimeSteps(const std::vector<std::pair<QDateTime, std::set<RifWellRftAddress>>>& allTimeSteps, 
+    static std::map<QDateTime, std::set<RifWellRftAddress>> timeStepsFromGridCase(RimEclipseCase* gridCase);
+    static std::map<QDateTime, std::set<RifWellRftAddress>> timeStepsFromWellLogFile(RimWellLogFile* wellLogFile);
+    static std::map<QDateTime, std::set<RifWellRftAddress>> adjacentTimeSteps(const std::vector<std::pair<QDateTime, std::set<RifWellRftAddress>>>& allTimeSteps, 
                                                                        const std::pair<QDateTime, std::set<RifWellRftAddress>>& searchTimeStepPair);
     static bool                                      mapContainsTimeStep(const std::map<QDateTime, std::set<RifWellRftAddress>>& map, const QDateTime& timeStep);