diff --git a/openair2/COMMON/rrc_messages_types.h b/openair2/COMMON/rrc_messages_types.h
index fac23bb942..037dfbe86c 100644
--- a/openair2/COMMON/rrc_messages_types.h
+++ b/openair2/COMMON/rrc_messages_types.h
@@ -409,6 +409,7 @@ typedef struct NRRrcConfigurationReq_s {
   uint8_t                 mnc_digit_length[PLMN_LIST_MAX_SIZE];
   uint8_t                 num_plmn;
 
+  bool um_on_default_drb;
   bool                    enable_sdap;
   int                     drbs;
 } gNB_RrcConfigurationReq;
diff --git a/openair2/GNB_APP/gnb_config.c b/openair2/GNB_APP/gnb_config.c
index 8f679bf59c..64fa933970 100644
--- a/openair2/GNB_APP/gnb_config.c
+++ b/openair2/GNB_APP/gnb_config.c
@@ -1541,7 +1541,6 @@ void RCconfig_NRRRC(gNB_RRC_INST *rrc)
 
     rrc->nr_cellid        = (uint64_t)*(GNBParamList.paramarray[i][GNB_NRCELLID_IDX].u64ptr);
 
-    rrc->um_on_default_drb = *(GNBParamList.paramarray[i][GNB_UMONDEFAULTDRB_IDX].uptr);
     if (strcmp(*(GNBParamList.paramarray[i][GNB_TRANSPORT_S_PREFERENCE_IDX].strptr), "local_mac") == 0) {
       
     } else if (strcmp(*(GNBParamList.paramarray[i][GNB_TRANSPORT_S_PREFERENCE_IDX].strptr), "cudu") == 0) {
@@ -1605,6 +1604,7 @@ void RCconfig_NRRRC(gNB_RRC_INST *rrc)
         nrrrc_config.enable_sdap = *GNBParamList.paramarray[i][GNB_ENABLE_SDAP_IDX].iptr;
         LOG_I(GNB_APP, "SDAP layer is %s\n", nrrrc_config.enable_sdap ? "enabled" : "disabled");
         nrrrc_config.drbs = *GNBParamList.paramarray[i][GNB_DRBS].iptr;
+        nrrrc_config.um_on_default_drb = *(GNBParamList.paramarray[i][GNB_UMONDEFAULTDRB_IDX].uptr);
         LOG_I(GNB_APP, "Data Radio Bearer count %d\n", nrrrc_config.drbs);
 
       }//
diff --git a/openair2/GNB_APP/gnb_paramdef.h b/openair2/GNB_APP/gnb_paramdef.h
index d59ecb9eb3..d78e438217 100644
--- a/openair2/GNB_APP/gnb_paramdef.h
+++ b/openair2/GNB_APP/gnb_paramdef.h
@@ -161,7 +161,7 @@ typedef enum {
 {GNB_CONFIG_STRING_NRCELLID,                     NULL,   0,            .u64ptr=NULL,.defint64val=1,               TYPE_UINT64,    0},  \
 {GNB_CONFIG_STRING_MINRXTXTIME,                  NULL,   0,            .iptr=NULL,  .defintval=2,                 TYPE_INT,       0},  \
 {GNB_CONFIG_STRING_ULPRBBLACKLIST,               NULL,   0,            .strptr=NULL,.defstrval="",                TYPE_STRING,    0},  \
-{GNB_CONFIG_STRING_UMONDEFAULTDRB,               NULL,   0,            .uptr=NULL,  .defuintval=0,                TYPE_UINT,      0},  \
+{GNB_CONFIG_STRING_UMONDEFAULTDRB,               NULL, PARAMFLAG_BOOL, .uptr=NULL,  .defuintval=0,                TYPE_UINT,      0},  \
 {GNB_CONFIG_STRING_FORCE256QAMOFF, GNB_CONFIG_HLP_FORCE256QAMOFF, PARAMFLAG_BOOL, .iptr=NULL, .defintval=0,        TYPE_INT,       0},  \
 {GNB_CONFIG_STRING_ENABLE_SDAP, GNB_CONFIG_HLP_STRING_ENABLE_SDAP, PARAMFLAG_BOOL,.iptr=NULL, .defintval=0,       TYPE_INT,       0},  \
 {GNB_CONFIG_STRING_DRBS, GNB_CONFIG_HLP_STRING_DRBS,     0,            .iptr=NULL,  .defintval=1,                 TYPE_INT,       0},  \
diff --git a/openair2/RRC/NR/nr_rrc_defs.h b/openair2/RRC/NR/nr_rrc_defs.h
index 0bda25a056..a31747a415 100644
--- a/openair2/RRC/NR/nr_rrc_defs.h
+++ b/openair2/RRC/NR/nr_rrc_defs.h
@@ -391,8 +391,6 @@ typedef struct gNB_RRC_INST_s {
   // gNB N3 GTPU instance
   instance_t e1_inst;
 
-  int um_on_default_drb;
-
   char *uecap_file;
 
   // security configuration (preferred algorithms)
diff --git a/openair2/RRC/NR/rrc_gNB.c b/openair2/RRC/NR/rrc_gNB.c
index 94d2efb569..9683804cb0 100644
--- a/openair2/RRC/NR/rrc_gNB.c
+++ b/openair2/RRC/NR/rrc_gNB.c
@@ -2352,7 +2352,7 @@ void prepare_and_send_ue_context_modification_f1(rrc_gNB_ue_context_t *ue_contex
   f1ap_drb_to_be_setup_t drbs[nb_drb];
   for (int i = 0; i < nb_drb; i++) {
     drbs[i].drb_id = e1ap_resp->pduSession[0].DRBnGRanList[i].id;
-    drbs[i].rlc_mode = rrc->um_on_default_drb ? RLC_MODE_UM : RLC_MODE_AM;
+    drbs[i].rlc_mode = rrc->configuration.um_on_default_drb ? RLC_MODE_UM : RLC_MODE_AM;
     drbs[i].up_ul_tnl[0].tl_address = e1ap_resp->pduSession[0].DRBnGRanList[i].UpParamList[0].tlAddress;
     drbs[i].up_ul_tnl[0].port = rrc->eth_params_s.my_portd;
     drbs[i].up_ul_tnl[0].teid = e1ap_resp->pduSession[0].DRBnGRanList[i].UpParamList[0].teId;