diff --git a/openair2/RRC/NR/rrc_gNB.c b/openair2/RRC/NR/rrc_gNB.c
index 840844a0ec..7b0333db85 100644
--- a/openair2/RRC/NR/rrc_gNB.c
+++ b/openair2/RRC/NR/rrc_gNB.c
@@ -1029,9 +1029,18 @@ static void rrc_handle_RRCSetupRequest(gNB_RRC_INST *rrc,
     return;
   }
 
+  NR_CellGroupConfig_t *cellGroupConfig = NULL;
+  asn_dec_rval_t dec_rval = uper_decode_complete(NULL,
+                                                 &asn_DEF_NR_CellGroupConfig,
+                                                 (void **)&cellGroupConfig,
+                                                 msg->du2cu_rrc_container,
+                                                 msg->du2cu_rrc_container_length);
+  AssertFatal(dec_rval.code == RC_OK && dec_rval.consumed > 0, "Cell group config decode error\n");
+
   gNB_RRC_UE_t *UE = &ue_context_p->ue_context;
   UE = &ue_context_p->ue_context;
   UE->establishment_cause = rrcSetupRequest->establishmentCause;
+  UE->masterCellGroup = cellGroupConfig;
   activate_srb(UE, 1);
   rrc_gNB_generate_RRCSetup(0, msg->crnti, ue_context_p, msg->du2cu_rrc_container, msg->du2cu_rrc_container_length);
 }