diff --git a/flowexperimental/comp/flowexp_comp.cpp b/flowexperimental/comp/flowexp_comp.cpp
index 6cb06be16bd..997232fd508 100644
--- a/flowexperimental/comp/flowexp_comp.cpp
+++ b/flowexperimental/comp/flowexp_comp.cpp
@@ -70,9 +70,11 @@ namespace Opm{
         void beginIteration(){};
         // add the water rate due to aquifers to the source term.
         template<class RateVector, class Context>
-        void addToSource(RateVector& rates, const Context& context, unsigned spaceIdx, unsigned timeIdx) const{};
+        void addToSource(RateVector& /*rates*/, const Context& /*context*/,
+                         unsigned /*spaceIdx*/, unsigned /*timeIdx*/) const {}
         template<class RateVector>
-        void addToSource(RateVector& rates, unsigned globalSpaceIdx, unsigned timeIdx) const{};
+        void addToSource(RateVector& /*rates*/, unsigned /*globalSpaceIdx*/,
+                         unsigned /*timeIdx*/) const {}
         void endIteration()const{};
         void endTimeStep(){};
         void endEpisode(){};
diff --git a/opm/simulators/flow/FlowProblem.hpp b/opm/simulators/flow/FlowProblem.hpp
index 0e423a00c0c..a9d359bb7c8 100644
--- a/opm/simulators/flow/FlowProblem.hpp
+++ b/opm/simulators/flow/FlowProblem.hpp
@@ -251,6 +251,8 @@ class FlowProblem : public GetPropType<TypeTag, Properties::BaseProblem>
         relpermDiagnostics.diagnosis(vanguard.eclState(), vanguard.cartesianIndexMapper());
     }
 
+    virtual ~FlowProblem() = default;
+
     void prefetch(const Element& elem) const
     { pffDofData_.prefetch(elem); }
 
diff --git a/opm/simulators/flow/FlowProblemBlackoil.hpp b/opm/simulators/flow/FlowProblemBlackoil.hpp
index 862381bf761..f0ec0309011 100644
--- a/opm/simulators/flow/FlowProblemBlackoil.hpp
+++ b/opm/simulators/flow/FlowProblemBlackoil.hpp
@@ -1147,7 +1147,7 @@ class FlowProblemBlackoil : public FlowProblem<TypeTag>
         this->eclWriter_->endRestart();
     }
 
-    void readEquilInitialCondition_()
+    void readEquilInitialCondition_() override
     {
         const auto& simulator = this->simulator();
 
diff --git a/opm/simulators/flow/FlowProblemComp.hpp b/opm/simulators/flow/FlowProblemComp.hpp
index 42f1871f45b..ac447e68a61 100644
--- a/opm/simulators/flow/FlowProblemComp.hpp
+++ b/opm/simulators/flow/FlowProblemComp.hpp
@@ -299,7 +299,7 @@ class FlowProblemComp : public FlowProblem<TypeTag>
         values.assignNaive(fs);
     }
 
-    void addToSourceDense(RateVector&, unsigned, unsigned) const
+    void addToSourceDense(RateVector&, unsigned, unsigned) const override
     {
         // we do nothing for now
     }
@@ -326,7 +326,7 @@ class FlowProblemComp : public FlowProblem<TypeTag>
         // we do nothing here for now
     }
 
-    void readEquilInitialCondition_()
+    void readEquilInitialCondition_() override
     {
         throw std::logic_error("Equilibration is not supported by compositional modeling yet");
     }
@@ -336,7 +336,7 @@ class FlowProblemComp : public FlowProblem<TypeTag>
         throw std::logic_error("Restarting is not supported by compositional modeling yet");
     }
 
-    void readExplicitInitialCondition_()
+    void readExplicitInitialCondition_() override
     {
         readExplicitInitialConditionCompositional_();
     }