diff --git a/opm/core/props/satfunc/RelpermDiagnostics.hpp b/opm/core/props/satfunc/RelpermDiagnostics.hpp
index 17921f34..63745ad4 100644
--- a/opm/core/props/satfunc/RelpermDiagnostics.hpp
+++ b/opm/core/props/satfunc/RelpermDiagnostics.hpp
@@ -72,7 +72,8 @@ namespace Opm {
             OilWater,
             OilGas,
             WaterGas,
-            BlackOil
+            BlackOil,
+            Solvent
         };
         
         FluidSystem fluidSystem_;