diff --git a/ocaml/Makefile b/ocaml/Makefile
index 8e7f7987..360ab525 100644
--- a/ocaml/Makefile
+++ b/ocaml/Makefile
@@ -19,11 +19,15 @@ ALL_EXE=$(patsubst %.ml,%.native,$(wildcard qp_*.ml))
 
 .PHONY: executables default
 
+
 default: $(ALL_TESTS) $(ALL_EXE)
 
 executables: 
 	$(MAKE) -C $(QPACKAGE_ROOT)/data executables
 
+external_libs:
+	opam install cryptokit core
+
 qpackage.odocl: $(MLIFILES)
 	ls $(MLIFILES) | sed "s/\.mli//" > qpackage.odocl
 
diff --git a/src/Dets/H_apply.irp.f b/src/Dets/H_apply.irp.f
index 63726b1e..18dd0201 100644
--- a/src/Dets/H_apply.irp.f
+++ b/src/Dets/H_apply.irp.f
@@ -136,6 +136,7 @@ subroutine copy_H_apply_buffer_to_wf
   do j=0,nproc-1
     N_det = N_det + H_apply_buffer(j)%N_det
   enddo
+  SOFT_TOUCH N_det
   
   if (psi_det_size < N_det) then
     psi_det_size = N_det
diff --git a/src/Dets/utils.irp.f b/src/Dets/utils.irp.f
index 27022965..22faee83 100644
--- a/src/Dets/utils.irp.f
+++ b/src/Dets/utils.irp.f
@@ -1,7 +1,7 @@
 BEGIN_PROVIDER [ double precision, H_matrix_all_dets,(N_det,N_det) ]
  implicit none
  BEGIN_DOC
- ! H matrix on the basis of the slater deter;inants defined by psi_det
+ ! H matrix on the basis of the slater determinants defined by psi_det
  END_DOC
  integer :: i,j
  double precision :: hij