diff --git a/src/post_process/m_mpi_proxy.fpp b/src/post_process/m_mpi_proxy.fpp
index effe0b9bb3..f8d6844c8f 100644
--- a/src/post_process/m_mpi_proxy.fpp
+++ b/src/post_process/m_mpi_proxy.fpp
@@ -107,7 +107,7 @@ contains
             & 'file_per_process', 'relax', 'cf_wrt',                           &
             & 'adv_n', 'ib', 'cfl_adap_dt', 'cfl_const_dt', 'cfl_dt',          &
             & 'surface_tension', 'hyperelasticity', 'bubbles_lagrange',        &
-            & 'output_partial_domain', 'relativity', 'cont_damage' ]
+            & 'output_partial_domain', 'relativity', 'cont_damage', 'bc_io']
             call MPI_BCAST(${VAR}$, 1, MPI_LOGICAL, 0, MPI_COMM_WORLD, ierr)
         #:endfor