diff --git a/lib/include/srslte/interfaces/enb_interfaces.h b/lib/include/srslte/interfaces/enb_interfaces.h
index 1b4f0da56..550e6e3ea 100644
--- a/lib/include/srslte/interfaces/enb_interfaces.h
+++ b/lib/include/srslte/interfaces/enb_interfaces.h
@@ -274,8 +274,8 @@ public:
 class s1ap_interface_rrc
 {
 public:
-  virtual void initial_ue(uint16_t rnti, srslte::byte_buffer_t *pdu) = 0;
-  virtual void initial_ue(uint16_t rnti, srslte::byte_buffer_t *pdu, uint32_t m_tmsi, uint8_t mmec) = 0;
+  virtual void initial_ue(uint16_t rnti, LIBLTE_S1AP_RRC_ESTABLISHMENT_CAUSE_ENUM cause, srslte::byte_buffer_t *pdu) = 0;
+  virtual void initial_ue(uint16_t rnti, LIBLTE_S1AP_RRC_ESTABLISHMENT_CAUSE_ENUM cause, srslte::byte_buffer_t *pdu, uint32_t m_tmsi, uint8_t mmec) = 0;
   virtual void write_pdu(uint16_t rnti, srslte::byte_buffer_t *pdu) = 0;
   virtual bool user_exists(uint16_t rnti) = 0; 
   virtual bool user_release(uint16_t rnti, LIBLTE_S1AP_CAUSERADIONETWORK_ENUM cause_radio) = 0;
diff --git a/srsenb/hdr/upper/rrc.h b/srsenb/hdr/upper/rrc.h
index 77895facb..69e2b75ce 100644
--- a/srsenb/hdr/upper/rrc.h
+++ b/srsenb/hdr/upper/rrc.h
@@ -251,6 +251,8 @@ public:
 
     struct timeval t_last_activity; 
 
+    LIBLTE_RRC_CON_REQ_EST_CAUSE_ENUM establishment_cause;
+
     // S-TMSI for this UE
     bool      has_tmsi;
     uint32_t  m_tmsi;
diff --git a/srsenb/hdr/upper/s1ap.h b/srsenb/hdr/upper/s1ap.h
index 2e355649f..284b67d03 100644
--- a/srsenb/hdr/upper/s1ap.h
+++ b/srsenb/hdr/upper/s1ap.h
@@ -72,8 +72,8 @@ public:
   void run_thread();
 
   // RRC interface
-  void initial_ue(uint16_t rnti, srslte::byte_buffer_t *pdu);
-  void initial_ue(uint16_t rnti, srslte::byte_buffer_t *pdu, uint32_t m_tmsi, uint8_t mmec);
+  void initial_ue(uint16_t rnti, LIBLTE_S1AP_RRC_ESTABLISHMENT_CAUSE_ENUM cause, srslte::byte_buffer_t *pdu);
+  void initial_ue(uint16_t rnti, LIBLTE_S1AP_RRC_ESTABLISHMENT_CAUSE_ENUM cause, srslte::byte_buffer_t *pdu, uint32_t m_tmsi, uint8_t mmec);
   void write_pdu(uint16_t rnti, srslte::byte_buffer_t *pdu);
   bool user_exists(uint16_t rnti); 
   bool user_release(uint16_t rnti, LIBLTE_S1AP_CAUSERADIONETWORK_ENUM cause_radio);
@@ -128,7 +128,7 @@ private:
   bool handle_s1setupfailure(LIBLTE_S1AP_MESSAGE_S1SETUPFAILURE_STRUCT *msg);
   bool handle_erabsetuprequest(LIBLTE_S1AP_MESSAGE_E_RABSETUPREQUEST_STRUCT *msg);
 
-  bool send_initialuemessage(uint16_t rnti, srslte::byte_buffer_t *pdu, bool has_tmsi, uint32_t m_tmsi=0, uint8_t mmec=0);
+  bool send_initialuemessage(uint16_t rnti, LIBLTE_S1AP_RRC_ESTABLISHMENT_CAUSE_ENUM cause, srslte::byte_buffer_t *pdu, bool has_tmsi, uint32_t m_tmsi=0, uint8_t mmec=0);
   bool send_ulnastransport(uint16_t rnti, srslte::byte_buffer_t *pdu);
   bool send_uectxtreleaserequest(uint16_t rnti, LIBLTE_S1AP_CAUSE_STRUCT *cause);
   bool send_uectxtreleasecomplete(uint16_t rnti, uint32_t mme_ue_id, uint32_t enb_ue_id);
diff --git a/srsenb/src/upper/rrc.cc b/srsenb/src/upper/rrc.cc
index f3d61829f..eccf18f6a 100644
--- a/srsenb/src/upper/rrc.cc
+++ b/srsenb/src/upper/rrc.cc
@@ -1043,6 +1043,7 @@ void rrc::ue::handle_rrc_con_req(LIBLTE_RRC_CONNECTION_REQUEST_STRUCT *msg)
     m_tmsi    = msg->ue_id.s_tmsi.m_tmsi;
     has_tmsi = true;
   }
+  establishment_cause = msg->cause;
   send_connection_setup();
   state = RRC_STATE_WAIT_FOR_CON_SETUP_COMPLETE;
 }
@@ -1069,9 +1070,9 @@ void rrc::ue::handle_rrc_con_setup_complete(LIBLTE_RRC_CONNECTION_SETUP_COMPLETE
   parent->mac->phy_config_enabled(rnti, true);
 
   if(has_tmsi) {
-    parent->s1ap->initial_ue(rnti, pdu, m_tmsi, mmec);
+    parent->s1ap->initial_ue(rnti, (LIBLTE_S1AP_RRC_ESTABLISHMENT_CAUSE_ENUM)establishment_cause, pdu, m_tmsi, mmec);
   } else {
-    parent->s1ap->initial_ue(rnti, pdu);
+    parent->s1ap->initial_ue(rnti, (LIBLTE_S1AP_RRC_ESTABLISHMENT_CAUSE_ENUM)establishment_cause, pdu);
   }
   state = RRC_STATE_WAIT_FOR_CON_RECONF_COMPLETE;
 }
diff --git a/srsenb/src/upper/s1ap.cc b/srsenb/src/upper/s1ap.cc
index 3f9861e11..da399fe14 100644
--- a/srsenb/src/upper/s1ap.cc
+++ b/srsenb/src/upper/s1ap.cc
@@ -174,22 +174,22 @@ void s1ap::build_tai_cgi()
 /*******************************************************************************
 /* RRC interface
 ********************************************************************************/
-void s1ap::initial_ue(uint16_t rnti, srslte::byte_buffer_t *pdu)
+void s1ap::initial_ue(uint16_t rnti, LIBLTE_S1AP_RRC_ESTABLISHMENT_CAUSE_ENUM cause, srslte::byte_buffer_t *pdu)
 {
   ue_ctxt_map[rnti].eNB_UE_S1AP_ID = next_eNB_UE_S1AP_ID++;
   ue_ctxt_map[rnti].stream_id      = 1;
   ue_ctxt_map[rnti].release_requested = false;
   enbid_to_rnti_map[ue_ctxt_map[rnti].eNB_UE_S1AP_ID] = rnti;
-  send_initialuemessage(rnti, pdu, false);
+  send_initialuemessage(rnti, cause, pdu, false);
 }
 
-void s1ap::initial_ue(uint16_t rnti, srslte::byte_buffer_t *pdu, uint32_t m_tmsi, uint8_t mmec)
+void s1ap::initial_ue(uint16_t rnti, LIBLTE_S1AP_RRC_ESTABLISHMENT_CAUSE_ENUM cause, srslte::byte_buffer_t *pdu, uint32_t m_tmsi, uint8_t mmec)
 {
   ue_ctxt_map[rnti].eNB_UE_S1AP_ID = next_eNB_UE_S1AP_ID++;
   ue_ctxt_map[rnti].stream_id      = 1;
   ue_ctxt_map[rnti].release_requested = false;
   enbid_to_rnti_map[ue_ctxt_map[rnti].eNB_UE_S1AP_ID] = rnti;
-  send_initialuemessage(rnti, pdu, true, m_tmsi, mmec);
+  send_initialuemessage(rnti, cause, pdu, true, m_tmsi, mmec);
 }
 
 void s1ap::write_pdu(uint16_t rnti, srslte::byte_buffer_t *pdu)
@@ -609,7 +609,7 @@ bool s1ap::handle_s1setupfailure(LIBLTE_S1AP_MESSAGE_S1SETUPFAILURE_STRUCT *msg)
 /* S1AP message senders
 ********************************************************************************/
 
-bool s1ap::send_initialuemessage(uint16_t rnti, srslte::byte_buffer_t *pdu, bool has_tmsi, uint32_t m_tmsi, uint8_t mmec)
+bool s1ap::send_initialuemessage(uint16_t rnti, LIBLTE_S1AP_RRC_ESTABLISHMENT_CAUSE_ENUM cause, srslte::byte_buffer_t *pdu, bool has_tmsi, uint32_t m_tmsi, uint8_t mmec)
 {
   if(!mme_connected) {
     return false;
@@ -662,7 +662,7 @@ bool s1ap::send_initialuemessage(uint16_t rnti, srslte::byte_buffer_t *pdu, bool
 
   // RRC Establishment Cause
   initue->RRC_Establishment_Cause.ext = false;
-  initue->RRC_Establishment_Cause.e   = LIBLTE_S1AP_RRC_ESTABLISHMENT_CAUSE_MO_SIGNALLING;
+  initue->RRC_Establishment_Cause.e   = cause;
 
   liblte_s1ap_pack_s1ap_pdu(&tx_pdu, (LIBLTE_BYTE_MSG_STRUCT*)&msg);
   s1ap_log->info_hex(msg.msg, msg.N_bytes, "Sending InitialUEMessage for RNTI:0x%x", rnti);