--- a/src/http/ngx_http.c
+++ b/src/http/ngx_http.c
@@ -1144,12 +1144,8 @@ ngx_http_add_listen(ngx_conf_t *cf, ngx_
     in_port_t                   p;
     ngx_uint_t                  i;
     struct sockaddr            *sa;
-    struct sockaddr_in         *sin;
     ngx_http_conf_port_t       *port;
     ngx_http_core_main_conf_t  *cmcf;
-#if (NGX_HAVE_INET6)
-    struct sockaddr_in6        *sin6;
-#endif
 
     cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module);
 
@@ -1162,27 +1158,7 @@ ngx_http_add_listen(ngx_conf_t *cf, ngx_
     }
 
     sa = &lsopt->sockaddr.sockaddr;
-
-    switch (sa->sa_family) {
-
-#if (NGX_HAVE_INET6)
-    case AF_INET6:
-        sin6 = &lsopt->sockaddr.sockaddr_in6;
-        p = sin6->sin6_port;
-        break;
-#endif
-
-#if (NGX_HAVE_UNIX_DOMAIN)
-    case AF_UNIX:
-        p = 0;
-        break;
-#endif
-
-    default: /* AF_INET */
-        sin = &lsopt->sockaddr.sockaddr_in;
-        p = sin->sin_port;
-        break;
-    }
+    p = ngx_inet_get_port(sa);
 
     port = cmcf->ports->elts;
     for (i = 0; i < cmcf->ports->nelts; i++) {