diff --git a/src/http/ngx_http_core_module.c b/src/http/ngx_http_core_module.c
index e60863788..ac83f58b6 100644
--- a/src/http/ngx_http_core_module.c
+++ b/src/http/ngx_http_core_module.c
@@ -3440,7 +3440,7 @@ ngx_http_core_init_main_conf(ngx_conf_t *cf, void *conf)
             ngx_align(cmcf->server_names_hash_bucket_size, ngx_cacheline_size);
 
 
-    ngx_conf_init_uint_value(cmcf->variables_hash_max_size, 512);
+    ngx_conf_init_uint_value(cmcf->variables_hash_max_size, 1024);
     ngx_conf_init_uint_value(cmcf->variables_hash_bucket_size, 64);
 
     cmcf->variables_hash_bucket_size =