diff --git a/src/mme/mme-fd-path.c b/src/mme/mme-fd-path.c
index 6336e3b84..b3ac7d9e9 100644
--- a/src/mme/mme-fd-path.c
+++ b/src/mme/mme-fd-path.c
@@ -1023,8 +1023,8 @@ static void mme_s6a_ula_cb(void *data, struct msg **msg)
                             OGS_HEX(hdr->avp_value->os.data, (int)hdr->avp_value->os.len, buf), OGS_CHRGCHARS_LEN);
                         session->charging_characteristics_presence = true;
                     } else {
-                        memcpy(session->charging_characteristics, mme_ue->charging_characteristics, OGS_CHRGCHARS_LEN);
-                        session->charging_characteristics_presence = mme_ue->charging_characteristics_presence;
+                        memcpy(session->charging_characteristics, (uint8_t *)"\x00\x00", OGS_CHRGCHARS_LEN);
+                        session->charging_characteristics_presence = false;
                     }
 
                     /* AVP: 'Served-Party-IP-Address'(848)
diff --git a/src/mme/mme-s11-build.c b/src/mme/mme-s11-build.c
index 7e142176c..d19e53bd6 100644
--- a/src/mme/mme-s11-build.c
+++ b/src/mme/mme-s11-build.c
@@ -333,7 +333,11 @@ ogs_pkbuf_t *mme_s11_build_create_session_request(
     if (session->charging_characteristics_presence == true) {
         req->charging_characteristics.presence = 1;
         req->charging_characteristics.data = session->charging_characteristics;
-        req->charging_characteristics.len = 2;
+        req->charging_characteristics.len = OGS_CHRGCHARS_LEN;
+    } else if (mme_ue->charging_characteristics_presence == true) {
+        req->charging_characteristics.presence = 1;
+        req->charging_characteristics.data = mme_ue->charging_characteristics;
+        req->charging_characteristics.len = OGS_CHRGCHARS_LEN;
     }
 
     gtp_message.h.type = type;