--- a/src/http/ngx_http_upstream.c
+++ b/src/http/ngx_http_upstream.c
@@ -646,18 +646,10 @@ ngx_http_upstream_cache(ngx_http_request
             u->method = ngx_http_core_get_method;
         }
 
-        c = ngx_pcalloc(r->pool, sizeof(ngx_http_cache_t));
-        if (c == NULL) {
+        if (ngx_http_file_cache_create(r) != NGX_OK) {
             return NGX_ERROR;
         }
 
-        if (ngx_array_init(&c->keys, r->pool, 4, sizeof(ngx_str_t)) != NGX_OK) {
-            return NGX_ERROR;
-        }
-
-        r->cache = c;
-        c->file.log = r->connection->log;
-
         if (u->create_key(r) != NGX_OK) {
             return NGX_ERROR;
         }
@@ -668,6 +660,8 @@ ngx_http_upstream_cache(ngx_http_request
 
         u->cacheable = 1;
 
+        c = r->cache;
+
         c->min_uses = u->conf->cache_min_uses;
         c->body_start = u->conf->buffer_size;
         c->file_cache = u->conf->cache->data;