diff --git a/dumux/implicit/mpnc/energy/mpncindicesenergykinetic.hh b/dumux/implicit/mpnc/energy/mpncindicesenergykinetic.hh
index 4f1f619fceacf046a6dbdb10639095ceddfc82e3..7163ccfebfb3708516d4b84e588a235ccca2ea46 100644
--- a/dumux/implicit/mpnc/energy/mpncindicesenergykinetic.hh
+++ b/dumux/implicit/mpnc/energy/mpncindicesenergykinetic.hh
@@ -74,7 +74,10 @@ public:
     /*!
      * \brief This module defines one new primary variable.
      */
-    static const unsigned int NumPrimaryVars = 1;
+    static const unsigned int numPrimaryVars = 1;
+
+    DUNE_DEPRECATED_MSG("use numPrimaryVars (uncapitalized 'n') instead")
+    static const unsigned int NumPrimaryVars = numPrimaryVars; //!< \deprecated
 
     /*!
      * \brief Index for the temperature in a vector of primary
@@ -100,7 +103,10 @@ public:
      * \brief This module does not define any primary variables in the
      *        isothermal case.
      */
-    static const unsigned int NumPrimaryVars = 0;
+    static const unsigned int numPrimaryVars = 0;
+
+    DUNE_DEPRECATED_MSG("use numPrimaryVars (uncapitalized 'n') instead")
+    static const unsigned int NumPrimaryVars = numPrimaryVars; //!< \deprecated
 
     /*!
      * \brief Equation index of the temperature primary variable. This
diff --git a/dumux/implicit/mpnc/mpncvolumevariablesia.hh b/dumux/implicit/mpnc/mpncvolumevariablesia.hh
index 6341f6dab552b4d50642e4eb59efcd03bc9038de..c49ef0d7dbff431d68900d5f41e6f53018fc66d5 100644
--- a/dumux/implicit/mpnc/mpncvolumevariablesia.hh
+++ b/dumux/implicit/mpnc/mpncvolumevariablesia.hh
@@ -91,34 +91,6 @@ public:
      */
     void checkDefined() const
     { }
-
-    /*!
-     * \brief Check the set variables as to whether they are in physically possible ranges.
-     *
-     * \param fluidState Container for all the secondary variables concerning the fluids
-     * \param globalPos The position at which the check is conducted
-     *
-     * Since we are in equilibrium, we don't need to do anything!
-     */
-     bool physicalness(const FluidState & fluidState,
-                         const GlobalPosition & globalPos)
-    {
-        return true; // all the checks went through: tell calling function, nothing bad could be found.
-    }
-
-     /*!
-      * \brief Output for the case that the current state is not physical.
-      *        This calls the output functions of the modules and throws and exception:
-      *        i.e. a smaller timestep is tried.
-      *
-      * Since we are in equilibrium, we don't need to do anything!
-      *
-      * \param fs Container for all the secondary variables concerning the fluids
-      * \param message A string returning the error message for this module
-      */
-     const void physicalnessError(const FluidState & fs,
-                                  std::stringstream & message)
-     { }
 };
 
 } // namespace Dumux