diff --git a/opm/autodiff/SimulatorFullyImplicitBlackoilEbos.hpp b/opm/autodiff/SimulatorFullyImplicitBlackoilEbos.hpp
index 8eac96f0f..08aa61335 100644
--- a/opm/autodiff/SimulatorFullyImplicitBlackoilEbos.hpp
+++ b/opm/autodiff/SimulatorFullyImplicitBlackoilEbos.hpp
@@ -179,12 +179,12 @@ public:
 
         WellState wellStateDummy; //not used. Only passed to make the old interfaces happy
 
-        // if ( model_param_.matrix_add_well_contributions_ )
-        // {
+        if ( model_param_.matrix_add_well_contributions_ )
+        {
             ebosSimulator_.model().clearAuxiliaryModules();
             auto auxMod = std::make_shared<WellConnectionAuxiliaryModule<TypeTag> >(schedule(), grid());
             ebosSimulator_.model().addAuxiliaryModule(auxMod);
-        // }
+        }
 
         // Main simulation loop.
         while (!timer.done()) {