diff --git a/srsepc/hdr/mme/nas.h b/srsepc/hdr/mme/nas.h
index 4ce4382bc..10179c95c 100644
--- a/srsepc/hdr/mme/nas.h
+++ b/srsepc/hdr/mme/nas.h
@@ -132,6 +132,7 @@ typedef struct {
   std::string                         short_net_name;
   srsran::CIPHERING_ALGORITHM_ID_ENUM cipher_algo;
   srsran::INTEGRITY_ALGORITHM_ID_ENUM integ_algo;
+  bool                                request_imeisv;
 } nas_init_t;
 
 typedef struct {
@@ -268,6 +269,7 @@ private:
   std::string m_dns;
   std::string m_full_net_name;
   std::string m_short_net_name;
+  bool        m_request_imeisv = false;
 
   // Timers timeout values
   uint16_t m_t3413 = 0;
diff --git a/srsepc/hdr/mme/s1ap_common.h b/srsepc/hdr/mme/s1ap_common.h
index 5fe6e6f89..3c38d6929 100644
--- a/srsepc/hdr/mme/s1ap_common.h
+++ b/srsepc/hdr/mme/s1ap_common.h
@@ -42,6 +42,7 @@ typedef struct {
   std::string                         pcap_filename;
   srsran::CIPHERING_ALGORITHM_ID_ENUM encryption_algo;
   srsran::INTEGRITY_ALGORITHM_ID_ENUM integrity_algo;
+  bool                                request_imeisv;
 } s1ap_args_t;
 
 typedef struct {
diff --git a/srsepc/src/main.cc b/srsepc/src/main.cc
index c2ace4cb2..d541e3412 100644
--- a/srsepc/src/main.cc
+++ b/srsepc/src/main.cc
@@ -84,6 +84,7 @@ void parse_args(all_args_t* args, int argc, char* argv[])
   string   dns_addr;
   string   full_net_name;
   string   short_net_name;
+  bool     request_imeisv;
   string   hss_db_file;
   string   hss_auth_algo;
   string   log_filename;
@@ -113,6 +114,7 @@ void parse_args(all_args_t* args, int argc, char* argv[])
     ("mme.encryption_algo", bpo::value<string>(&encryption_algo)->default_value("EEA0"),     "Set preferred encryption algorithm for NAS layer ")
     ("mme.integrity_algo",  bpo::value<string>(&integrity_algo)->default_value("EIA1"),      "Set preferred integrity protection algorithm for NAS")
     ("mme.paging_timer",    bpo::value<uint16_t>(&paging_timer)->default_value(2),           "Set paging timer value in seconds (T3413)")
+    ("mme.request_imeisv",  bpo::value<bool>(&request_imeisv)->default_value(false),         "Enable IMEISV request in Security mode command")
     ("hss.db_file",         bpo::value<string>(&hss_db_file)->default_value("ue_db.csv"),    ".csv file that stores UE's keys")
     ("spgw.gtpu_bind_addr", bpo::value<string>(&spgw_bind_addr)->default_value("127.0.0.1"), "IP address of SP-GW for the S1-U connection")
     ("spgw.sgi_if_addr",    bpo::value<string>(&sgi_if_addr)->default_value("176.16.0.1"),   "IP address of TUN interface for the SGi connection")
@@ -272,6 +274,7 @@ void parse_args(all_args_t* args, int argc, char* argv[])
   args->mme_args.s1ap_args.short_net_name = short_net_name;
   args->mme_args.s1ap_args.mme_apn        = mme_apn;
   args->mme_args.s1ap_args.paging_timer   = paging_timer;
+  args->mme_args.s1ap_args.request_imeisv = request_imeisv;
   args->spgw_args.gtpu_bind_addr          = spgw_bind_addr;
   args->spgw_args.sgi_if_addr             = sgi_if_addr;
   args->spgw_args.sgi_if_name             = sgi_if_name;
diff --git a/srsepc/src/mme/nas.cc b/srsepc/src/mme/nas.cc
index c43324390..56d8f6da7 100644
--- a/srsepc/src/mme/nas.cc
+++ b/srsepc/src/mme/nas.cc
@@ -36,7 +36,8 @@ nas::nas(const nas_init_t& args, const nas_if_t& itf) :
   m_dns(args.dns),
   m_full_net_name(args.full_net_name),
   m_short_net_name(args.short_net_name),
-  m_t3413(args.paging_timer)
+  m_t3413(args.paging_timer),
+  m_request_imeisv(args.request_imeisv)
 {
   m_sec_ctx.integ_algo  = args.integ_algo;
   m_sec_ctx.cipher_algo = args.cipher_algo;
@@ -1380,7 +1381,11 @@ bool nas::pack_security_mode_command(srsran::byte_buffer_t* nas_buffer)
   sm_cmd.ue_security_cap.gea_present = m_sec_ctx.ms_network_cap_present;
   memcpy(sm_cmd.ue_security_cap.gea, m_sec_ctx.ms_network_cap.gea, 8 * sizeof(bool));
 
-  sm_cmd.imeisv_req_present = false;
+  sm_cmd.imeisv_req_present = m_request_imeisv;
+  if (m_request_imeisv) {
+    sm_cmd.imeisv_req = LIBLTE_MME_IMEISV_REQUESTED;
+  }
+
   sm_cmd.nonce_ue_present   = false;
   sm_cmd.nonce_mme_present  = false;
 
diff --git a/srsepc/src/mme/s1ap_nas_transport.cc b/srsepc/src/mme/s1ap_nas_transport.cc
index b4d701eb4..6e7633c16 100644
--- a/srsepc/src/mme/s1ap_nas_transport.cc
+++ b/srsepc/src/mme/s1ap_nas_transport.cc
@@ -71,6 +71,7 @@ void s1ap_nas_transport::init()
   m_nas_init.paging_timer = m_s1ap->m_s1ap_args.paging_timer;
   m_nas_init.integ_algo   = m_s1ap->m_s1ap_args.integrity_algo;
   m_nas_init.cipher_algo  = m_s1ap->m_s1ap_args.encryption_algo;
+  m_nas_init.request_imeisv = m_s1ap->m_s1ap_args.request_imeisv;
 
   // Init NAS interface
   m_nas_if.s1ap = s1ap::get_instance();