diff --git a/SofaKernel/modules/SofaBaseLinearSolver/src/SofaBaseLinearSolver/CGLinearSolver.inl b/SofaKernel/modules/SofaBaseLinearSolver/src/SofaBaseLinearSolver/CGLinearSolver.inl
index ddbd40a4d39..cbb7457d4ad 100644
--- a/SofaKernel/modules/SofaBaseLinearSolver/src/SofaBaseLinearSolver/CGLinearSolver.inl
+++ b/SofaKernel/modules/SofaBaseLinearSolver/src/SofaBaseLinearSolver/CGLinearSolver.inl
@@ -40,9 +40,6 @@ CGLinearSolver<TMatrix,TVector>::CGLinearSolver()
     , d_graph( initData(&d_graph,"graph","Graph of residuals at each iteration") )
 {
     d_graph.setWidget("graph");
-    d_maxIter.setRequired(true);
-    d_tolerance.setRequired(true);
-    d_smallDenominatorThreshold.setRequired(true);
 }
 
 /// Initialization function checking input Data