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-rw-r--r--src/http/ngx_http_upstream.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/http/ngx_http_upstream.c b/src/http/ngx_http_upstream.c
index 8922dbc8b..5b55b263b 100644
--- a/src/http/ngx_http_upstream.c
+++ b/src/http/ngx_http_upstream.c
@@ -2238,6 +2238,8 @@ ngx_http_upstream_process_headers(ngx_http_request_t *r, ngx_http_upstream_t *u)
r->headers_out.content_length_n = u->headers_in.content_length_n;
+ r->disable_not_modified = !u->cacheable;
+
u->length = -1;
return NGX_OK;