diff --git a/Grid/algorithms/Algorithms.h b/Grid/algorithms/Algorithms.h
index be4a0825e..2941f7989 100644
--- a/Grid/algorithms/Algorithms.h
+++ b/Grid/algorithms/Algorithms.h
@@ -88,7 +88,7 @@ NAMESPACE_CHECK(multigrid);
 #include <Grid/algorithms/iterative/KrylovSchur.h>
 #include <Grid/algorithms/iterative/BlockKrylovSchur.h>
 #include <Grid/algorithms/iterative/SplitGridBlockKrylovSchur.h>
-#include <Grid/algorithms/iterative/HarmonicBlockKrylovSchur.h>
+//#include <Grid/algorithms/iterative/HarmonicBlockKrylovSchur.h>
 #include <Grid/algorithms/iterative/Arnoldi.h>
 #include <Grid/algorithms/iterative/LanczosBidiagonalization.h>
 #include <Grid/algorithms/iterative/RestartedLanczosBidiagonalization.h>