diff --git a/openair-cn/S6A/s6a_auth_info.c b/openair-cn/S6A/s6a_auth_info.c
index bb75843e13..ec47869941 100644
--- a/openair-cn/S6A/s6a_auth_info.c
+++ b/openair-cn/S6A/s6a_auth_info.c
@@ -305,9 +305,12 @@ int s6a_generate_authentication_info_req(s6a_auth_info_req_t *air_p)
 
     /* Destination Host */
     {
-        char host[40]  = "hss.";
+        char host[100];
         size_t hostlen;
 
+        memset(host, 0, 100);
+        strcat(host, mme_config.s6a_config.hss_host_name);
+        strcat(host, ".");
         strcat(host, mme_config.realm);
 
         hostlen = strlen(host);