diff --git a/AMDiS/src/parallel/PetscSolverFeti.cc b/AMDiS/src/parallel/PetscSolverFeti.cc
index 7f50efae7020d42c794ba0a00bea0dbb690d1c7c..86e68725841da531651b0f9998a9bceeea053e3c 100644
--- a/AMDiS/src/parallel/PetscSolverFeti.cc
+++ b/AMDiS/src/parallel/PetscSolverFeti.cc
@@ -1826,7 +1826,7 @@ namespace AMDiS { namespace Parallel {
 		       &matNullSpace);
     MatSetNullSpace(mat_feti, matNullSpace);
     Mat amat, pmat;
-    KSPGetOperators(ksp, &amat, &pmat);
+    KSPGetOperators(ksp_feti, &amat, &pmat);
     MatSetNullSpace(amat, matNullSpace);
     MatNullSpaceDestroy(&matNullSpace);