diff --git a/opm/core/simulator/initStateEquil_impl.hpp b/opm/core/simulator/initStateEquil_impl.hpp
index 761499ba..ef5d6996 100644
--- a/opm/core/simulator/initStateEquil_impl.hpp
+++ b/opm/core/simulator/initStateEquil_impl.hpp
@@ -433,7 +433,7 @@ namespace Opm
                        const CellRange&                    cells,
                        std::vector< std::vector<double> >& press)
         {
-            const bool water = FluidSystem::phaseIsActive(FluidSystem::oilPhaseIdx);
+            const bool water = FluidSystem::phaseIsActive(FluidSystem::waterPhaseIdx);
             const bool oil = FluidSystem::phaseIsActive(FluidSystem::oilPhaseIdx);
             const bool gas = FluidSystem::phaseIsActive(FluidSystem::gasPhaseIdx);
             const int oilpos = FluidSystem::oilPhaseIdx;