diff --git a/lib/include/srsran/asn1/rrc_nr_utils.h b/lib/include/srsran/asn1/rrc_nr_utils.h
index 04477dd80..d732aa57a 100644
--- a/lib/include/srsran/asn1/rrc_nr_utils.h
+++ b/lib/include/srsran/asn1/rrc_nr_utils.h
@@ -116,6 +116,8 @@ bool make_phy_ssb_cfg(const srsran_carrier_nr_t&                     carrier,
                       phy_cfg_nr_t::ssb_cfg_t*                       ssb);
 bool make_pdsch_cfg_from_serv_cell(const asn1::rrc_nr::serving_cell_cfg_s& serv_cell, srsran_sch_hl_cfg_nr_t* sch_hl);
 bool make_csi_cfg_from_serv_cell(const asn1::rrc_nr::serving_cell_cfg_s& serv_cell, srsran_csi_hl_cfg_t* csi_hl);
+bool make_duplex_cfg_from_serv_cell(const asn1::rrc_nr::serving_cell_cfg_common_s& serv_cell,
+                                    srsran_duplex_config_nr_t*                     duplex_cfg);
 
 /***************************
  *      MAC Config
diff --git a/lib/src/asn1/rrc_nr_utils.cc b/lib/src/asn1/rrc_nr_utils.cc
index 751f8e3a5..12964a225 100644
--- a/lib/src/asn1/rrc_nr_utils.cc
+++ b/lib/src/asn1/rrc_nr_utils.cc
@@ -1539,6 +1539,18 @@ bool make_csi_cfg_from_serv_cell(const asn1::rrc_nr::serving_cell_cfg_s& serv_ce
   return true;
 }
 
+bool make_duplex_cfg_from_serv_cell(const asn1::rrc_nr::serving_cell_cfg_common_s& serv_cell,
+                                    srsran_duplex_config_nr_t*                     duplex_cfg)
+{
+  duplex_cfg->mode = serv_cell.tdd_ul_dl_cfg_common_present ? SRSRAN_DUPLEX_MODE_TDD : SRSRAN_DUPLEX_MODE_FDD;
+  if (serv_cell.tdd_ul_dl_cfg_common_present) {
+    if (not make_phy_tdd_cfg(serv_cell.tdd_ul_dl_cfg_common, duplex_cfg)) {
+      return false;
+    }
+  }
+  return true;
+}
+
 } // namespace srsran
 
 namespace srsenb {
diff --git a/srsenb/src/stack/rrc/rrc_nr.cc b/srsenb/src/stack/rrc/rrc_nr.cc
index 4c206ae87..567249067 100644
--- a/srsenb/src/stack/rrc/rrc_nr.cc
+++ b/srsenb/src/stack/rrc/rrc_nr.cc
@@ -254,6 +254,8 @@ void rrc_nr::config_mac()
   ret2 = srsran::make_phy_ssb_cfg(
       cfg.cell_list[0].phy_cell.carrier, sp_cell.recfg_with_sync.sp_cell_cfg_common, &cell.ssb);
   srsran_assert(ret2, "Invalid NR cell configuration.");
+  ret2 = srsran::make_duplex_cfg_from_serv_cell(sp_cell.recfg_with_sync.sp_cell_cfg_common, &cell.duplex);
+  srsran_assert(ret2, "Invalid NR cell configuration.");
 
   // FIXME: entire SI configuration, etc needs to be ported to NR
   sched_interface::cell_cfg_t cell_cfg;
@@ -1401,6 +1403,8 @@ void rrc_nr::ue::crnti_ce_received()
     srsran::make_phy_ssb_cfg(parent->cfg.cell_list[0].phy_cell.carrier,
                              cell_group_cfg.sp_cell_cfg.recfg_with_sync.sp_cell_cfg_common,
                              &uecfg.phy_cfg.ssb);
+    srsran::make_duplex_cfg_from_serv_cell(cell_group_cfg.sp_cell_cfg.recfg_with_sync.sp_cell_cfg_common,
+                                           &uecfg.phy_cfg.duplex);
 
     parent->mac->ue_cfg(rnti, uecfg);
   }