diff --git a/src/core/ngx_string.h b/src/core/ngx_string.h
index db7857a..00d0ae9 100644
--- a/src/core/ngx_string.h
+++ b/src/core/ngx_string.h
@@ -136,25 +136,25 @@
 
 uint32_t ngx_utf_decode(u_char **p, size_t n);
 size_t ngx_utf_length(u_char *p, size_t n);
-u_char * ngx_utf_cpystrn(u_char *dst, u_char *src, size_t n);
+u_char *ngx_utf_cpystrn(u_char *dst, u_char *src, size_t n);
 
 
-#define NGX_ESCAPE_URI     0
-#define NGX_ESCAPE_ARGS    1
-#define NGX_ESCAPE_HTML    2
+#define NGX_ESCAPE_URI       0
+#define NGX_ESCAPE_ARGS      1
+#define NGX_ESCAPE_HTML      2
 
-#define NGX_UNESCAPE_URI   1
+#define NGX_UNESCAPE_URI     1
 
 uintptr_t ngx_escape_uri(u_char *dst, u_char *src, size_t size,
     ngx_uint_t type);
 void ngx_unescape_uri(u_char **dst, u_char **src, size_t size, ngx_uint_t type);
 
 
-#define  ngx_qsort                qsort
+#define ngx_qsort            qsort
 
 
-#define  ngx_value_helper(n)      #n
-#define  ngx_value(n)             ngx_value_helper(n)
+#define ngx_value_helper(n)  #n
+#define ngx_value(n)         ngx_value_helper(n)
 
 
 #endif /* _NGX_STRING_H_INCLUDED_ */