diff --git a/src/mme/emm_build.c b/src/mme/emm_build.c
index 07287db0d..f9a20f6d9 100644
--- a/src/mme/emm_build.c
+++ b/src/mme/emm_build.c
@@ -333,6 +333,10 @@ status_t emm_build_tau_accept(pkbuf_t **emmbuf, mme_ue_t *mme_ue)
     d_assert(mme_ue, return CORE_ERROR,);
 
     memset(&message, 0, sizeof(message));
+    message.h.security_header_type = 
+        NAS_SECURITY_HEADER_INTEGRITY_PROTECTED_AND_CIPHERED;
+    message.h.protocol_discriminator = NAS_PROTOCOL_DISCRIMINATOR_EMM;
+
     message.emm.h.protocol_discriminator = NAS_PROTOCOL_DISCRIMINATOR_EMM;
     message.emm.h.message_type = NAS_TRACKING_AREA_UPDATE_ACCEPT;
 
diff --git a/src/mme/nas_path.c b/src/mme/nas_path.c
index 5884e59fb..73d0962e5 100644
--- a/src/mme/nas_path.c
+++ b/src/mme/nas_path.c
@@ -391,7 +391,7 @@ status_t nas_send_tau_accept(
     status_t rv;
     pkbuf_t *emmbuf = NULL;
 
-    d_assert(mme_ue, return CORE_ERROR, "Null param");
+    d_assert(mme_ue, return CORE_ERROR,);
 
     d_trace(3, "[EMM] Tracking area update accept\n");
     d_trace(5, "    IMSI[%s]\n", mme_ue->imsi_bcd);