diff --git a/openair1/PHY/INIT/nr_init_ru.c b/openair1/PHY/INIT/nr_init_ru.c
index bf447645d6..674c70cdc3 100644
--- a/openair1/PHY/INIT/nr_init_ru.c
+++ b/openair1/PHY/INIT/nr_init_ru.c
@@ -180,4 +180,8 @@ void nr_phy_free_RU(RU_t *ru)
       free_and_zero(ru->common.beam_id[i]);
     free_and_zero(ru->common.beam_id);
   }
+
+  PHY_VARS_gNB *gNB0 = ru->gNB_list[0];
+  gNB0->num_RU--;
+  DevAssert(gNB0->num_RU >= 0);
 }
diff --git a/openair1/SIMULATION/NR_PHY/prachsim.c b/openair1/SIMULATION/NR_PHY/prachsim.c
index 08bf2e8fe6..de69fb6c16 100644
--- a/openair1/SIMULATION/NR_PHY/prachsim.c
+++ b/openair1/SIMULATION/NR_PHY/prachsim.c
@@ -467,6 +467,7 @@ int main(int argc, char **argv){
   ru->nb_rx          = n_rx;
   ru->num_gNB        = 1;
   ru->gNB_list[0]    = gNB;
+  gNB->num_RU = 1;
   gNB->gNB_config.carrier_config.num_tx_ant.value = 1;
   gNB->gNB_config.carrier_config.num_rx_ant.value = 1;
   if (mu == 0)