diff --git a/src/lbm/boundary/SimpleDiffusionDirichlet.h b/src/lbm/boundary/SimpleDiffusionDirichlet.h
index 81805c5b80a4adf75498d0b1930424d000f1af91..5fa9db33d07f1559913f0e0a8c9fb590b3dd3e4e 100644
--- a/src/lbm/boundary/SimpleDiffusionDirichlet.h
+++ b/src/lbm/boundary/SimpleDiffusionDirichlet.h
@@ -1,15 +1,15 @@
 //======================================================================================================================
 //
-//  This file is part of waLBerla. waLBerla is free software: you can 
+//  This file is part of waLBerla. waLBerla is free software: you can
 //  redistribute it and/or modify it under the terms of the GNU General Public
-//  License as published by the Free Software Foundation, either version 3 of 
+//  License as published by the Free Software Foundation, either version 3 of
 //  the License, or (at your option) any later version.
-//  
-//  waLBerla is distributed in the hope that it will be useful, but WITHOUT 
-//  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 
-//  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License 
+//
+//  waLBerla is distributed in the hope that it will be useful, but WITHOUT
+//  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+//  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 //  for more details.
-//  
+//
 //  You should have received a copy of the GNU General Public License along
 //  with waLBerla (see COPYING.txt). If not, see <http://www.gnu.org/licenses/>.
 //
@@ -108,9 +108,9 @@ private:
 
 template< typename LatticeModel_T, typename flag_t >
 inline SimpleDiffusionDirichlet< LatticeModel_T, flag_t >::SimpleDiffusionDirichlet( const BoundaryUID& boundaryUID, const FlagUID& uid, PDFField* const pdfField, const real_t val ) :
-   Boundary<flag_t>( boundaryUID ), uid_( uid ), pdfField_( pdfField ), val_( val ), init_(false) 
+   Boundary<flag_t>( boundaryUID ), uid_( uid ), pdfField_( pdfField ), val_( val ), init_(false)
 {
-   WALBERLA_ASSERT_NOT_NULLPTR( pdfField_ ); 
+   WALBERLA_ASSERT_NOT_NULLPTR( pdfField_ );
 }
 
 
@@ -139,17 +139,8 @@ inline void SimpleDiffusionDirichlet< LatticeModel_T, flag_t >::registerCell( Bu
 
 template< typename LatticeModel_T, typename flag_t >
 inline void SimpleDiffusionDirichlet< LatticeModel_T, flag_t >::registerCell( const flag_t, const cell_idx_t, const cell_idx_t, const cell_idx_t,
-                                                                                const BoundaryConfiguration & bc )
+                                                                                const BoundaryConfiguration & )
 {
-   WALBERLA_ASSERT_EQUAL( dynamic_cast< const ScalarConfiguration * >( &bc ), &bc );
-
-   const ScalarConfiguration & sclConfig = dynamic_cast< const ScalarConfiguration & >( bc );
-
-   if( init_ )
-      WALBERLA_ASSERT_FLOAT_EQUAL( val_, sclConfig.val() );
-
-   init_ = true;
-   val_  = sclConfig.val();
 }
 
 
@@ -183,7 +174,7 @@ inline void SimpleDiffusionDirichlet< LatticeModel_T, flag_t >::treatDirection(
    WALBERLA_ASSERT_EQUAL( ny, y + cell_idx_c( stencil::cy[ dir ] ) );
    WALBERLA_ASSERT_EQUAL( nz, z + cell_idx_c( stencil::cz[ dir ] ) );
    WALBERLA_ASSERT_UNEQUAL( mask & this->mask_, numeric_cast<flag_t>(0) );
-   WALBERLA_ASSERT_EQUAL  ( mask & this->mask_, this->mask_ ); 
+   WALBERLA_ASSERT_EQUAL  ( mask & this->mask_, this->mask_ );
    // only true if "this->mask_" only contains one single flag, which is the case for the current implementation of this boundary condition (SimpleDiffusionDirichlet)
 
    pdfField_->get( nx, ny, nz, Stencil::invDirIdx(dir) ) = real_t(2) * val_ * LatticeModel_T::w[Stencil::idx[dir]] - pdfField_->get( x, y, z, Stencil::idx[dir] );