diff --git a/src/SingleRefMethod/generators.irp.f b/src/SingleRefMethod/generators.irp.f
index 0edd6175..b12a681e 100644
--- a/src/SingleRefMethod/generators.irp.f
+++ b/src/SingleRefMethod/generators.irp.f
@@ -40,4 +40,10 @@ BEGIN_PROVIDER [ integer(bit_kind), psi_generators, (N_int,2,psi_det_size) ]
 
 END_PROVIDER
 
-
+BEGIN_PROVIDER [ double precision, select_max, (1) ]
+ implicit none
+ BEGIN_DOC
+ ! Memo to skip useless selectors
+ END_DOC
+ select_max(1) = huge(1.d0)
+END_PROVIDER