diff --git a/src/http/modules/ngx_http_chunked_filter_module.c b/src/http/modules/ngx_http_chunked_filter_module.c
index a7dc5bf..89cc47a 100644
--- a/src/http/modules/ngx_http_chunked_filter_module.c
+++ b/src/http/modules/ngx_http_chunked_filter_module.c
@@ -212,6 +212,7 @@ ngx_http_chunked_body_filter(ngx_http_request_t *r, ngx_chain_t *in)
         b->tag = (ngx_buf_tag_t) &ngx_http_chunked_filter_module;
         b->temporary = 0;
         b->memory = 1;
+        b->flush = 1;
         b->pos = (u_char *) CRLF;
         b->last = b->pos + 2;