diff --git a/dune/dorie/interface/transport_simulation.cc b/dune/dorie/interface/transport_simulation.cc
index 16fc281c379e293a0d73516ab2cd035d8fecc9ff..552a590fa85ba218551d1484c8dfa5d4ee9628c4 100644
--- a/dune/dorie/interface/transport_simulation.cc
+++ b/dune/dorie/interface/transport_simulation.cc
@@ -80,9 +80,11 @@ template<typename Traits>
 void TransportSimulation<Traits>::operator_setup ()
 {
   if (!gf_water_flux)
-    DUNE_THROW(Dune::Exception," ");
+    DUNE_THROW(Dune::InvalidStateException,
+        "Pointer to gf_water_flux is invalid!");
   if (!gf_saturation)
-    DUNE_THROW(Dune::Exception," ");
+      DUNE_THROW(Dune::InvalidStateException,
+        "Pointer to gf_saturation is invalid!");
 
   // --- Local Operators ---
   double diff_coeff = inifile.get<double>("parameters.molecularDiffusion");