diff --git a/demo/rsa/main.lua b/demo/rsa/main.lua
index a59d46a7e..e672401c1 100644
--- a/demo/rsa/main.lua
+++ b/demo/rsa/main.lua
@@ -26,7 +26,7 @@ log.info("main", PROJECT, VERSION)
 _G.sys = require("sys")
 
 -- 因为这是通用demo, air101/air103跑满速才不至于太慢-_-
-if rtos.bsp() == "AIR101" or rtos.bsp() == "AIR103" or rtos.bsp() =="EC618" then
+if rtos.bsp() == "AIR101" or rtos.bsp() == "AIR103" then
     if mcu then
         mcu.setClk(240)
     end