diff --git a/ugbase/lib_disc/operator/linear_operator/multi_grid_solver/mg_solver_impl.hpp b/ugbase/lib_disc/operator/linear_operator/multi_grid_solver/mg_solver_impl.hpp
index 2ccad9c48..ebdb78e7f 100644
--- a/ugbase/lib_disc/operator/linear_operator/multi_grid_solver/mg_solver_impl.hpp
+++ b/ugbase/lib_disc/operator/linear_operator/multi_grid_solver/mg_solver_impl.hpp
@@ -82,7 +82,7 @@ AssembledMultiGridCycle() :
 	m_baseLev(0), m_cycleType(_V_),
 	m_numPreSmooth(2), m_numPostSmooth(2),
 	m_LocalFullRefLevel(0), m_GridLevelType(GridLevel::LEVEL),
-	m_bUseRAP(false), m_bSmoothOnSurfaceRim(false),
+	m_bUseRAP(false), m_bSmoothOnSurfaceRim(true),
 	m_bCommCompOverlap(false),
 	m_spPreSmootherPrototype(new Jacobi<TAlgebra>()),
 	m_spPostSmootherPrototype(m_spPreSmootherPrototype),
@@ -104,7 +104,7 @@ AssembledMultiGridCycle(SmartPtr<ApproximationSpace<TDomain> > approxSpace) :
 	m_baseLev(0), m_cycleType(_V_),
 	m_numPreSmooth(2), m_numPostSmooth(2),
 	m_LocalFullRefLevel(0), m_GridLevelType(GridLevel::LEVEL),
-	m_bUseRAP(false), m_bSmoothOnSurfaceRim(false),
+	m_bUseRAP(false), m_bSmoothOnSurfaceRim(true),
 	m_bCommCompOverlap(false),
 	m_spPreSmootherPrototype(new Jacobi<TAlgebra>()),
 	m_spPostSmootherPrototype(m_spPreSmootherPrototype),