diff --git a/app/nginx-1.16.1/src/event/ngx_event_connect.c b/app/nginx-1.16.1/src/event/ngx_event_connect.c
index a3589e672..36858f482 100644
--- a/app/nginx-1.16.1/src/event/ngx_event_connect.c
+++ b/app/nginx-1.16.1/src/event/ngx_event_connect.c
@@ -349,10 +349,20 @@ failed:
 
 #if (NGX_HAVE_TRANSPARENT_PROXY)
 
+#if (NGX_HAVE_FSTACK)
+extern int is_fstack_fd(int sockfd);
+#ifndef IP_BINDANY
+#define IP_BINDANY	24
+#endif
+#endif
+
 static ngx_int_t
 ngx_event_connect_set_transparent(ngx_peer_connection_t *pc, ngx_socket_t s)
 {
     int  value;
+#if defined(NGX_HAVE_FSTACK)
+    int optname;
+#endif
 
     value = 1;
 
@@ -377,12 +387,17 @@ ngx_event_connect_set_transparent(ngx_peer_connection_t *pc, ngx_socket_t s)
         FreeBSD define IP_BINDANY in freebsd/netinet/in.h
         Fstack should only support IP_BINDANY.
         ****/
-        #define IP_BINDANY	24
-        if (setsockopt(s, IPPROTO_IP, IP_BINDANY,
+        if(is_fstack_fd(s)){
+            optname = IP_BINDANY;
+        } else {
+            optname = IP_TRANSPARENT;
+        }
+
+        if (setsockopt(s, IPPROTO_IP, optname,
                        (const void *) &value, sizeof(int)) == -1)
         {
             ngx_log_error(NGX_LOG_ALERT, pc->log, ngx_socket_errno,
-                   "setsockopt(IP_BINDANY) failed");
+                   "setsockopt(IP_BINDANY/IP_TRANSPARENT) failed");
             return NGX_ERROR;
         }