diff --git a/src/http/ngx_http_request.h b/src/http/ngx_http_request.h
index 887afd9..913a036 100644
--- a/src/http/ngx_http_request.h
+++ b/src/http/ngx_http_request.h
@@ -190,6 +190,9 @@
 #endif
     unsigned             pipeline:1;
 
+    /* can we use sendfile ? */
+    unsigned             sendfile:1;
+
     unsigned             chunked:1;
     unsigned             header_only:1;
     unsigned             keepalive:1;