diff --git a/apisix/cli/util.lua b/apisix/cli/util.lua
index c83e04a1b04c..cc6206a844e1 100644
--- a/apisix/cli/util.lua
+++ b/apisix/cli/util.lua
@@ -21,7 +21,6 @@ local open = io.open
 local popen = io.popen
 local exit = os.exit
 local stderr = io.stderr
-local stdout = io.stdout
 local str_format = string.format
 local tonumber = tonumber