diff --git a/opm/material/components/CO2.hpp b/opm/material/components/CO2.hpp
index b8b1062c5..ba688aecc 100644
--- a/opm/material/components/CO2.hpp
+++ b/opm/material/components/CO2.hpp
@@ -169,7 +169,10 @@ public:
                                   const Evaluation& pressure,
                                   bool extrapolate = false)
     {
-        return tabulatedEnthalpy.eval(temperature, pressure, extrapolate);
+        // TEST 2nd degree polynomial fitted with Coolprop data in temperature
+        // range (273.15, 403.15) with reference state T=288.15 K (=15 C) and p = 101325 Pa
+        return (temperature - 273.15 - 15)*(8.42323594e+02 + 4.54513769e-01*(temperature - 273.15 - 15)) - 0.005 * (pressure - 1.01325e5);
+        // return tabulatedEnthalpy.eval(temperature, pressure, extrapolate);
     }
 
     /*!
diff --git a/opm/material/fluidsystems/blackoilpvt/BrineCo2Pvt.hpp b/opm/material/fluidsystems/blackoilpvt/BrineCo2Pvt.hpp
index eb8c1381d..3ea7733c7 100644
--- a/opm/material/fluidsystems/blackoilpvt/BrineCo2Pvt.hpp
+++ b/opm/material/fluidsystems/blackoilpvt/BrineCo2Pvt.hpp
@@ -635,10 +635,10 @@ private:
         /* heat of dissolution for CO2 according to Fig. 6 in Duan and Sun 2003. (kJ/kg)
            In the relevant temperature ranges CO2 dissolution is
            exothermal */
-        delta_hCO2 = (-57.4375 + T * 0.1325) * 1000/44;
+        // delta_hCO2 = (-57.4375 + T * 0.1325) * 1000/44;
 
         /* enthalpy contribution of CO2 (kJ/kg) */
-        hg = CO2::gasEnthalpy(T, p, extrapolate)/1E3 + delta_hCO2;
+        hg = CO2::gasEnthalpy(T, p, extrapolate)/1E3;  //+ delta_hCO2;
 
         /* Enthalpy of brine with dissolved CO2 */
         return (h_ls1 - X_CO2_w*hw + hg*X_CO2_w)*1E3; /*J/kg*/