diff --git a/dumux/material/fluidsystems/h2oairmesitylenefluidsystem.hh b/dumux/material/fluidsystems/h2oairmesitylenefluidsystem.hh
index 22ba1e324273e1759848c373ed10acc75f548a4b..7ef6d87462662f4d3a66963e04fd13fb4428bd46 100644
--- a/dumux/material/fluidsystems/h2oairmesitylenefluidsystem.hh
+++ b/dumux/material/fluidsystems/h2oairmesitylenefluidsystem.hh
@@ -66,7 +66,9 @@ class H2OAirMesitylene
 public:
     typedef Dumux::Mesitylene<Scalar> NAPL;
     typedef Dumux::Air<Scalar> Air;
-    typedef TabulatedH2O H2O;
+//    typedef TabulatedH2O H2O;
+    typedef IapwsH2O H2O;
+
 
     static const int numPhases = 3;
     static const int numComponents = 3;