diff --git a/scripts/combine.lua b/scripts/combine.lua
index 2bdc29c..7706de4 100644
--- a/scripts/combine.lua
+++ b/scripts/combine.lua
@@ -26,7 +26,7 @@ ngx.log(ngx.INFO, 'REQ_BODY -> ', ngx.req.get_body_data())
 
 local images = req_body["payload"]["images"]
 
-local image_origin = read_body["payload"]["image_origin"]
+local image_origin = req_body["payload"]["image_origin"]
 
 -- Judge payload image origin
 if image_origin == "WX" then