diff --git a/lib/algorithms/CoarsenedMatrix.h b/lib/algorithms/CoarsenedMatrix.h
index 43164a1c..eb4e3c16 100644
--- a/lib/algorithms/CoarsenedMatrix.h
+++ b/lib/algorithms/CoarsenedMatrix.h
@@ -151,7 +151,7 @@ namespace Grid {
 
       RealD scale;
 
-      ConjugateGradient<FineField> CG(1.0e-2,10000);
+      ConjugateGradient<FineField> CG(5.0e-3,10000);
       FineField noise(FineGrid);
       FineField Mn(FineGrid);