diff --git a/srsue/hdr/stack/ue_stack_lte.h b/srsue/hdr/stack/ue_stack_lte.h
index 8b2c6c736..b5c606af2 100644
--- a/srsue/hdr/stack/ue_stack_lte.h
+++ b/srsue/hdr/stack/ue_stack_lte.h
@@ -59,8 +59,15 @@ public:
 
   std::string get_type() final;
 
-  int  init(const stack_args_t& args_, srslte::logger* logger_);
-  int  init(const stack_args_t& args_, srslte::logger* logger_, phy_interface_stack_lte* phy_, gw_interface_stack* gw_);
+  int init(const stack_args_t& args_, srslte::logger* logger_);
+  int init(const stack_args_t& args_, srslte::logger* logger_, phy_interface_stack_lte* phy_, gw_interface_stack* gw_);
+#ifdef HAVE_5GNR
+  int init(const stack_args_t&      args_,
+           srslte::logger*          logger_,
+           phy_interface_stack_lte* phy_,
+           phy_interface_stack_nr*  phy_nr_,
+           gw_interface_stack*      gw_);
+#endif
   bool switch_on() final;
   bool switch_off() final;
   bool is_registered() final;
@@ -177,6 +184,9 @@ private:
   // RAT-specific interfaces
   phy_interface_stack_lte* phy = nullptr;
   gw_interface_stack*      gw  = nullptr;
+#ifdef HAVE_5GNR
+  phy_interface_stack_nr* phy_nr = nullptr;
+#endif
 
   // Thread
   static const int                      STACK_MAIN_THREAD_PRIO = 4; // Next lower priority after PHY workers
diff --git a/srsue/src/stack/ue_stack_lte.cc b/srsue/src/stack/ue_stack_lte.cc
index e44be258f..de3e20887 100644
--- a/srsue/src/stack/ue_stack_lte.cc
+++ b/srsue/src/stack/ue_stack_lte.cc
@@ -65,6 +65,21 @@ std::string ue_stack_lte::get_type()
   return "lte";
 }
 
+#ifdef HAVE_5GNR
+int ue_stack_lte::init(const stack_args_t&      args_,
+                       srslte::logger*          logger_,
+                       phy_interface_stack_lte* phy_,
+                       phy_interface_stack_nr*  phy_nr_,
+                       gw_interface_stack*      gw_)
+{
+  phy_nr = phy_nr_;
+  if (init(args_, logger_, phy_, gw_)) {
+    return SRSLTE_ERROR;
+  }
+  return SRSLTE_SUCCESS;
+}
+#endif
+
 int ue_stack_lte::init(const stack_args_t&      args_,
                        srslte::logger*          logger_,
                        phy_interface_stack_lte* phy_,
@@ -142,10 +157,15 @@ int ue_stack_lte::init(const stack_args_t& args_, srslte::logger* logger_)
   rlc.init(&pdcp, &rrc, task_sched.get_timer_handler(), 0 /* RB_ID_SRB0 */);
   pdcp.init(&rlc, &rrc, gw);
   nas.init(usim.get(), &rrc, gw, args.nas);
+
 #ifdef HAVE_5GNR
+  if (phy_nr == nullptr) {
+    srslte::console("Failed to init as phy_nr is missing.\n");
+    return SRSLTE_ERROR;
+  }
   mac_nr_args_t mac_nr_args = {};
-  mac_nr.init(mac_nr_args, (phy_interface_mac_nr*)phy, &rlc);
-  rrc_nr.init((phy_interface_rrc_nr*)phy,
+  mac_nr.init(mac_nr_args, phy_nr, &rlc);
+  rrc_nr.init(phy_nr,
               &mac_nr,
               &rlc,
               &pdcp,
diff --git a/srsue/src/ue.cc b/srsue/src/ue.cc
index d277ee6e4..d4777e20c 100644
--- a/srsue/src/ue.cc
+++ b/srsue/src/ue.cc
@@ -107,12 +107,17 @@ int ue::init(const all_args_t& args_, srslte::logger* logger_)
       srslte::console("Error initializing NR PHY.\n");
       ret = SRSLTE_ERROR;
     }
-#endif // HAVE_5GNR
+    if (lte_stack->init(args.stack, old_logger, lte_phy.get(), lte_phy.get(), gw_ptr.get())) {
+      srslte::console("Error initializing stack.\n");
+      ret = SRSLTE_ERROR;
+    }
+#else // HAVE_5GNR
 
     if (lte_stack->init(args.stack, old_logger, lte_phy.get(), gw_ptr.get())) {
       srslte::console("Error initializing stack.\n");
       ret = SRSLTE_ERROR;
     }
+#endif
 
     if (gw_ptr->init(args.gw, old_logger, lte_stack.get())) {
       srslte::console("Error initializing GW.\n");