diff --git a/src/cipsi/pt2_stoch_routines.irp.f b/src/cipsi/pt2_stoch_routines.irp.f
index 281b0c5d..6d7a7ceb 100644
--- a/src/cipsi/pt2_stoch_routines.irp.f
+++ b/src/cipsi/pt2_stoch_routines.irp.f
@@ -189,7 +189,7 @@ subroutine ZMQ_pt2(E, pt2,relative_error, error, variance, norm, N_in)
       if (zmq_put_ivector(zmq_to_qp_run_socket,1,'pt2_stoch_istate',pt2_stoch_istate,1) == -1) then
         stop 'Unable to put pt2_stoch_istate on ZMQ server'
       endif
-      if (zmq_put_dvector(zmq_to_qp_run_socket,1,'threshold_generators',threshold_generators,1) == -1) then
+      if (zmq_put_dvector(zmq_to_qp_run_socket,1,'threshold_generators',(/threshold_generators/),1) == -1) then
         stop 'Unable to put threshold_generators on ZMQ server'
       endif