diff --git a/src/cis/cis.irp.f b/src/cis/cis.irp.f
index acec29c2..c4100105 100644
--- a/src/cis/cis.irp.f
+++ b/src/cis/cis.irp.f
@@ -79,6 +79,6 @@ subroutine run
   call ezfio_set_cis_energy(CI_energy)
   psi_coef = ci_eigenvectors
   SOFT_TOUCH psi_coef
-  call save_wavefunction_truncated(1.d-12)
+  call save_wavefunction_truncated(threshold_save_wf)
 
 end
diff --git a/src/determinants/EZFIO.cfg b/src/determinants/EZFIO.cfg
index 662c6fbb..1e85693b 100644
--- a/src/determinants/EZFIO.cfg
+++ b/src/determinants/EZFIO.cfg
@@ -136,3 +136,9 @@ doc: If |true|, discard any Slater determinants with an interaction smaller than
 interface: ezfio,provider,ocaml
 default: False
 
+
+[threshold_save_wf]
+type: Threshold
+doc: Threshold on the coefficients of the wave function when saving it into the ezfio
+interface: ezfio,provider,ocaml
+default: 1.e-14