diff --git a/Grid/algorithms/iterative/ImplicitlyRestartedBlockLanczos.h b/Grid/algorithms/iterative/ImplicitlyRestartedBlockLanczos.h
index e3afe43c..5076a527 100644
--- a/Grid/algorithms/iterative/ImplicitlyRestartedBlockLanczos.h
+++ b/Grid/algorithms/iterative/ImplicitlyRestartedBlockLanczos.h
@@ -180,7 +180,7 @@ public:
           Glog<<"orthogonalize after: "<<j<<" of "<<k<<" "<< ip <<std::endl;
       }
     }
-    normalize(w,if_print);
+    assert(normalize(w,if_print) != 0);
   }
   void reorthogonalize(Field& w, std::vector<Field>& evec, int k)
   {
diff --git a/tests/lanczos/Test_dwf_block_lanczos.cc b/tests/lanczos/Test_dwf_block_lanczos.cc
index 2aa83be1..a55c06a4 100644
--- a/tests/lanczos/Test_dwf_block_lanczos.cc
+++ b/tests/lanczos/Test_dwf_block_lanczos.cc
@@ -363,7 +363,7 @@ int main (int argc, char ** argv)
   std::vector<RealD> eval(JP.Nm);
   
   std::vector<FermionField> src(JP.Nu,FrbGrid);
-if (1)
+if (0)
 {
   std::cout << GridLogMessage << "Using RNG5"<<std::endl;
   FermionField src_tmp(FGrid);