diff --git a/dumux/porousmediumflow/2p/implicit/volumevariables.hh b/dumux/porousmediumflow/2p/implicit/volumevariables.hh
index 3b7caa05d533e5060610e68eef5d47b87b8fecf3..4ef10ae2ed5a4f56f6f981f4e918f6a6b223fa72 100644
--- a/dumux/porousmediumflow/2p/implicit/volumevariables.hh
+++ b/dumux/porousmediumflow/2p/implicit/volumevariables.hh
@@ -217,6 +217,15 @@ public:
     Scalar temperature() const
     { return fluidState_.temperature(/*phaseIdx=*/0); }
 
+    /*!
+     * \brief Returns the dynamic viscosity of the fluid within the
+     *        control volume in \f$\mathrm{[Pa s]}\f$.
+     *
+     * \param phaseIdx The phase index
+     */
+    Scalar viscosity(int phaseIdx) const
+    { return fluidState_.viscosity(phaseIdx); }
+
     /*!
      * \brief Returns the effective mobility of a given phase within
      *        the control volume in \f$[s*m/kg]\f$.