diff --git a/binding/nginx/src/ngx_http_ip2region_module.h b/binding/nginx/src/ngx_http_ip2region_module.h
index 90bb485..7bfbb7c 100644
--- a/binding/nginx/src/ngx_http_ip2region_module.h
+++ b/binding/nginx/src/ngx_http_ip2region_module.h
@@ -2,8 +2,8 @@
  * Created by Wu Jian Ping on - 2023/03/30.
  */
 
-#ifndef __NGX_HTTP_IP2REGION_MODULE_INCLUDED__
-#define __NGX_HTTP_IP2REGION_MODULE_INCLUDED__
+#ifndef __NGX_HTTP_IP2REGION_MODULE_H_INCLUDED__
+#define __NGX_HTTP_IP2REGION_MODULE_H_INCLUDED__
 
 #include <ngx_config.h>
 #include <ngx_core.h>
@@ -11,9 +11,9 @@
 #include "xdb_searcher.h"
 
 typedef struct {
-    xdb_searcher_t searcher;
-    xdb_vector_index_t *v_index;
-    xdb_content_t *c_buffer;
+    xdb_searcher_t       searcher;
+    xdb_vector_index_t  *v_index;
+    xdb_content_t       *c_buffer;
 } ip2region_searcher_t;
 
 typedef struct {