diff --git a/srsue/hdr/stack/upper/nas.h b/srsue/hdr/stack/upper/nas.h
index 37186d57d..e2d33fe33 100644
--- a/srsue/hdr/stack/upper/nas.h
+++ b/srsue/hdr/stack/upper/nas.h
@@ -39,7 +39,7 @@ class nas : public nas_interface_rrc, public srsran::timer_callback
 public:
   explicit nas(srsran::task_sched_handle task_sched_);
   virtual ~nas();
-  void init(usim_interface_nas* usim_, rrc_interface_nas* rrc_, gw_interface_nas* gw_, const nas_args_t& args_);
+  int  init(usim_interface_nas* usim_, rrc_interface_nas* rrc_, gw_interface_nas* gw_, const nas_args_t& args_);
   void stop();
   void run_tti();
 
diff --git a/srsue/src/stack/upper/nas.cc b/srsue/src/stack/upper/nas.cc
index 204d68893..3633e70e6 100644
--- a/srsue/src/stack/upper/nas.cc
+++ b/srsue/src/stack/upper/nas.cc
@@ -46,7 +46,7 @@ nas::nas(srsran::task_sched_handle task_sched_) :
   logger(srslog::fetch_basic_logger("NAS"))
 {}
 
-void nas::init(usim_interface_nas* usim_, rrc_interface_nas* rrc_, gw_interface_nas* gw_, const nas_args_t& cfg_)
+int nas::init(usim_interface_nas* usim_, rrc_interface_nas* rrc_, gw_interface_nas* gw_, const nas_args_t& cfg_)
 {
   usim = usim_;
   rrc  = rrc_;
@@ -105,6 +105,7 @@ void nas::init(usim_interface_nas* usim_, rrc_interface_nas* rrc_, gw_interface_
   }
 
   running = true;
+  return SRSRAN_SUCCESS;
 }
 
 nas::~nas() {}