diff --git a/plugins/op_waf/waf/lua/common.lua b/plugins/op_waf/waf/lua/common.lua
index 39e3b5a7e..d264a78b4 100644
--- a/plugins/op_waf/waf/lua/common.lua
+++ b/plugins/op_waf/waf/lua/common.lua
@@ -522,7 +522,7 @@ function _M.get_real_ip(self, server_name)
     if self.site_config[server_name] then
         if self.site_config[server_name]['cdn'] then
             local request_header = ngx.req.get_headers()
-            self:D("ipheader[0]:"..self:to_json(request_header))
+            self:D("ipheader[rr]:"..self:to_json(request_header))
             for _,v in ipairs(self.site_config[server_name]['cdn_header'])
             do
                 self:D("client_ip[for]:"..tostring(request_header[v]))