--- a/src/http/ngx_http_request.h
+++ b/src/http/ngx_http_request.h
@@ -498,6 +498,7 @@
      */
     unsigned                          limit_conn_set:1;
     unsigned                          limit_req_set:1;
+    unsigned                          sysguard_set:1;
 
 #if 0
     unsigned                          cacheable:1;
